Windows 11 is a capable operating system — but it ships configured for Microsoft's priorities, not yours. Background telemetry, aggressive indexing, power-throttling defaults, bloated startup sequences, and a raft of visual effects that look polished and cost real CPU cycles are all baked in by default. The result: a machine that feels slower than its hardware justifies, burns battery faster than it should, and quietly sends data you never agreed to share.

This guide fixes that. It is structured into five sections — general performance, privacy, startup and memory, gaming, and maintenance habits — each with step-by-step instructions. Work through the sections relevant to your use case. Even applying half these changes will produce a noticeably faster, quieter, and more responsive machine.

A quick note before starting: create a System Restore Point first. Open the Start Menu, search Create a restore point, click it, select your system drive, and click Create. This takes 90 seconds and gives you a one-click rollback if anything goes wrong. Every experienced Windows user does this before any significant change.

Section 1: Core Performance Tweaks

These changes address the most common causes of Windows 11 sluggishness. They are safe, reversible, and apply to all users regardless of hardware.

1.1 Disable Startup Apps

Every application that opens at boot consumes RAM and CPU before you have typed a single keystroke. Windows 11 ships with a surprising number of these enabled by default, and every application you install tries to join them.

How to do it:

1. Press Ctrl + Shift + Esc to open Task Manager
2. Click the Startup apps tab (or navigate to it on the left sidebar)
3. Look at the Startup impact column — sort by it descending
4. Right-click anything marked High impact that you do not need immediately on boot and select Disable

What to disable: Spotify, Discord, OneDrive (if you don't use it), Teams (personal), Skype, any game launcher you open manually, browser update helpers, and manufacturer utilities you never use. What to leave: Antivirus/security software, Bluetooth audio drivers if you use wireless headphones, any peripherals (mouse/keyboard software) that need to start with Windows.

Impact: Faster boot times, lower RAM usage at idle, snappier initial login experience.

1.2 Switch to High Performance or Ultimate Performance Power Plan

Windows 11 defaults to Balanced power mode, which throttles CPU clock speeds during brief idle moments to save energy. The ramp-up from idle to full speed takes a few milliseconds — multiplied across dozens of small tasks throughout the day, this adds up to sluggish responsiveness. On a desktop or plugged-in laptop, there is no reason to accept this trade-off.

Enable High Performance (quick method):

1. Open Control Panel → Power Options
2. Select High performance

Enable Ultimate Performance (maximum impact): Ultimate Performance is not visible by default. Run this command in PowerShell as Administrator:

powercfg -duplicatescheme e9a42b02-d5df-448d-aa00-03f14749eb61

Then return to Control Panel → Power Options and select Ultimate Performance.

The difference between High Performance and Ultimate Performance is that the latter also removes minimum processor idle state limits, which helps most in tasks with erratic CPU workloads. On a Ryzen 5800X with an RTX 3080, this change alone can deliver 8–15% more average performance in CPU-bound scenarios.

Laptop users: Use High Performance or Ultimate Performance only when plugged in. Revert to Balanced on battery — these plans raise idle power draw significantly and cut battery life.

1.3 Reduce Visual Effects

Windows 11's animations and transparency effects look good and cost real resources, particularly on older or lower-end hardware. On machines with 8GB RAM or less, reducing visual effects is one of the highest-impact free tweaks available.

How to do it:

1. Press Win + R, type sysdm.cpl, press Enter
2. Click the Advanced tab → under Performance, click Settings
3. Select Adjust for best performance — this disables all effects
4. Alternatively, select Custom and manually keep: Smooth edges of screen fonts and Show thumbnails instead of icons — these have minimal performance cost and meaningful usability benefit

For transparency effects specifically: Settings → Personalisation → Colors → toggle Transparency effects Off

Impact: Noticeably snappier on systems with 4–8GB RAM. On modern machines with 16GB+ RAM and a discrete GPU, the gain is minor but the setting is still worth applying.

1.4 Disable Storage Sense — Then Enable It on a Schedule

Storage Sense is Windows' built-in disk cleaner. It can run automatically and clear temporary files, old Windows Update packages, and Recycle Bin contents. The key is setting it to run on your schedule rather than constantly in the background.

How to configure it:

1. Settings → System → Storage → Storage Sense
2. Toggle it On
3. Set Run Storage Sense to Every week
4. Set Delete files in my recycle bin if they have been there for → 30 days
5. Set Delete files in my Downloads folder → Never (unless you want this — it is destructive)

For a deeper manual clean: Press Win + R → type cleanmgr → run Disk Cleanup → click Clean up system files → check Windows Update Cleanup and Temporary Internet Files → click OK. This can free several gigabytes on machines that have accumulated multiple Windows updates.

1.5 Update GPU, Chipset, and NVMe Drivers

Outdated GPU, chipset, and storage drivers are among the most common — and most overlooked — causes of sluggish Windows performance. Windows Update installs generic Microsoft-certified drivers, which are often several versions behind the manufacturer's current release.

GPU drivers: Go directly to the manufacturer — NVIDIA GeForce Experience or the NVIDIA driver page, AMD Radeon Software, or Intel Arc Control for Intel GPUs. Do not rely on Windows Update for GPU drivers.

Chipset drivers: Check AMD or Intel's websites for chipset drivers matching your motherboard's processor generation. AMD chipset drivers in particular update frequently and contain real-world scheduler and memory management improvements.

NVMe/SSD firmware: Check your SSD manufacturer's website (Samsung Magician, Crucial Storage Executive, Western Digital Dashboard) for firmware updates. SSD firmware updates can resolve throttling issues and improve sustained write performance.

1.6 Adjust Windows Search Indexing

Windows Search indexes your files to make search fast — but the indexing process itself consumes disk I/O and CPU in the background, particularly on mechanical hard drives. On SSDs, the performance cost is lower, but excluding irrelevant locations still helps.

How to configure it:

1. Open Control Panel → Indexing Options
2. Click Modify
3. Remove locations you never search — Program Files, Program Files (x86), and Windows folder are particularly wasteful to index
4. Keep your Users folder and any document/work folders you actually search

To disable indexing entirely (for drives that do not need search): Right-click the drive in File Explorer → Properties → uncheck Allow files on this drive to have contents indexed → Apply to drive and subfolders.

Section 2: Privacy Settings

Windows 11 24H2 introduced expanded AI integration through Copilot, Windows Recall, and AI-powered suggestions — and with it, more extensive telemetry collection. The following changes reduce data collection without affecting core OS functionality.

2.1 Reduce Diagnostic Data Collection

1. Settings → Privacy & Security → Diagnostics & Feedback
2. Under Diagnostic data, select Required diagnostic data (the minimum level — sends basic device and driver data only)
3. Toggle off Improve inking and typing (sends your keystrokes to Microsoft to improve autocorrect)
4. Set Feedback frequency to Never
5. Toggle off Tailored experiences (uses diagnostic data to show personalised tips and ads)

2.2 Disable Advertising ID and Personalisation

1. Settings → Privacy & Security → General
2. Toggle off Let apps show me personalised ads by using my advertising ID
3. Toggle off Let Windows improve Start and search results by tracking app launches
4. Toggle off Show me suggested content in the Settings app

2.3 Disable Activity History and Recall

Windows Recall (where available) takes periodic screenshots of your screen to build a searchable history. Regardless of how you feel about the feature's usefulness, it creates a local archive of everything displayed on your screen.

1. Settings → Privacy & Security → Activity History → toggle Store my activity history on this device Off
2. For Recall specifically: Settings → Privacy & Security → Recall & Snapshots → toggle Save snapshots Off (if the option appears on your device)

2.4 Review App Permissions

Apps frequently request broader permissions than they need. A quick audit takes five minutes:

Settings → Privacy & Security → scroll down to the App permissions section

Review and restrict: Location, Camera, Microphone, Contacts, Calendar, Call History, and Messaging. Toggle off access for any app that does not need it. A calculator app has no legitimate reason to access your location or microphone.

2.5 Use a Local Account

A Microsoft account syncs settings, browsing history, app data, and activity across devices — and to Microsoft's servers. If you do not need cross-device sync, a local account provides equivalent functionality with no cloud data exposure.

To switch: Settings → Accounts → Your Info → Sign in with a local account instead. Follow the prompts to create a local username and password. Windows will sign you out of Microsoft services like the Microsoft Store, but all local applications and files remain unaffected.

Section 3: Startup, RAM, and Background Processes

3.1 Manage Background App Activity

1. Settings → Apps → Installed Apps → find individual apps → click the three-dot menu → Advanced options
2. Under Background apps permissions, change from Always to Power optimized or Never

Do this for any app that does not need to send you notifications or sync in real time — news apps, photo editors, utilities, social apps, and so on.

3.2 Disable Fast Startup (If You Experience Boot Issues)

Fast Startup sounds beneficial but can cause conflicts on some systems — particularly after driver updates or with certain USB hardware. It works by saving a partial hibernation state rather than doing a clean shutdown. If your PC behaves oddly after restarts (devices not recognised, settings not applying), disable it:

Settings → System → Power & battery → Screen, sleep, & hibernate settings → click Additional power settings → Choose what the power buttons do → uncheck Turn on fast startup → Save changes.

3.3 Disable SysMain (Superfetch)

SysMain preloads frequently used applications into RAM so they launch faster. On systems with 8GB RAM or less, this can backfire — it consumes RAM that your active applications need, causing more paging to disk rather than less.

How to disable it:

1. Press Win + R, type services.msc, press Enter
2. Scroll to SysMain, double-click it
3. Set Startup type to Disabled, then click Stop, then OK

Note: On systems with 16GB+ RAM, SysMain is generally harmless and can improve perceived launch speed. Disable it only if you are RAM-constrained.

3.4 Adjust Virtual Memory (Page File)

By default, Windows manages virtual memory automatically. On systems with 8GB RAM, letting Windows auto-manage is usually fine. On systems under 8GB that are experiencing frequent slowdowns, setting a fixed page file can reduce the overhead of Windows dynamically adjusting it:

1. Press Win + R → sysdm.cpl → Advanced tab → under Performance click Settings
2. Click Advanced tab → under Virtual Memory click Change
3. Uncheck Automatically manage paging file size
4. Select your system drive → Custom size
5. Set Initial size to 1.5× your RAM in MB, Maximum size to 3× your RAM in MB
6. Click Set, then OK, then restart

Section 4: Gaming Optimizations

These changes are most relevant for dedicated gaming machines and high-refresh-rate setups. They are safe to apply but most impactful on desktop PCs.

4.1 Disable Virtualization-Based Security (VBS) and Memory Integrity

Virtualization-Based Security runs a hypervisor layer between your hardware and Windows. It protects against kernel-level attacks — but this protection comes at a measurable performance cost. Microsoft's own data shows VBS causes 5–10% performance drops in gaming workloads. Many new PCs ship with it enabled by default.

How to check and disable:

1. Search Core Isolation in the Start Menu → open it
2. Toggle Memory Integrity Off → restart when prompted
3. Verify: search System Information → look for Virtualization-based security → it should now show Not enabled

Important: This is a security trade-off. VBS protects against sophisticated kernel-level attacks. On a machine used for gaming at home, the risk profile is lower than on a work machine handling sensitive data. Make the decision based on your context.

4.2 Enable Hardware-Accelerated GPU Scheduling (HAGS)

HAGS moves the GPU scheduling workload from the CPU to the GPU itself, reducing latency by 1–3ms and improving frame pacing in CPU-bound scenarios. It is also a hard requirement for NVIDIA DLSS 3 Frame Generation.

How to enable: Settings → System → Display → Graphics → Change default graphics settings → toggle Hardware-accelerated GPU scheduling On → restart

Caveat: HAGS allocates up to 1GB of additional VRAM to maintain on-GPU command queues. On cards with 8GB VRAM or less that are already near their VRAM limit in demanding titles, HAGS can cause more stuttering than it prevents. Enable it, play for an hour, check your 1% low frame rates, and disable if consistency got worse.

Best supported on: NVIDIA RTX 30-series and later, AMD RX 6000-series and later, with current drivers installed.

4.3 Enable Game Mode and Optimisations for Windowed Games

1. Settings → Gaming → Game Mode → toggle On
2. Settings → System → Display → Graphics → toggle Optimizations for windowed games On

Game Mode tells Windows to deprioritise background tasks (including Windows Update) when a game is detected as the foreground process. Optimisations for windowed games brings the same low-latency resource allocation to borderless windowed mode that previously only applied to full-screen exclusive mode.

4.4 Disable Xbox Game Bar and Game DVR (If You Don't Use Them)

Xbox Game Bar runs a background capture loop even when you are not recording — consuming CPU and memory bandwidth. If you use dedicated recording software (OBS, NVIDIA ShadowPlay), or do not record at all, disable it:

1. Settings → Gaming → Xbox Game Bar → toggle Off
2. Settings → Gaming → Captures → toggle Record what happened Off

4.5 Enable Resizable BAR in BIOS

Resizable BAR (Base Address Register) allows the CPU to access the full GPU frame buffer instead of 256MB chunks, reducing CPU wait time for GPU data. It can improve performance by 5–15% in supported titles.

How to check: In NVIDIA's GeForce Experience → Performance overlay, or AMD's Radeon Software → Performance tab → look for Resizable BAR: Enabled.

To enable if it is off: Restart your PC → enter BIOS (usually Delete or F2 key during startup) → look for Above 4G Decoding and Resizable BAR / Smart Access Memory → enable both → save and exit. The option name varies by motherboard manufacturer.

Requires: A GPU and CPU that both support Resizable BAR (most hardware from 2020 onward), plus a BIOS update for some older motherboards.

Section 5: Ongoing Maintenance Habits

Optimisation is not a one-time event. The following habits keep your system running well over months and years.

5.1 Keep Drivers and Windows Updated — But on a Delay

Windows Updates contain real security patches, driver improvements, and stability fixes. Do not disable updates. However, setting a brief delay allows Microsoft to catch problems with buggy updates before they reach your machine:

Settings → Windows Update → Advanced options → Choose when updates are installed → pause feature updates for 2–4 weeks.

For drivers: check for GPU driver updates monthly, not daily. Chasing every incremental driver release is unnecessary and occasionally introduces new issues. Update when a driver release addresses a specific bug you are experiencing, or when a major new game is released with driver-level optimisations.

5.2 Review Privacy Settings After Every Major Update

Semi-annual Windows updates such as 24H2 often reset some privacy settings to default or introduce new privacy options. After every major feature update, revisit Settings → Privacy & Security and re-apply your preferred settings. Microsoft acknowledges this behaviour and it is unlikely to change.

5.3 Keep Your SSD at Least 15–20% Free

An SSD that exceeds 85% capacity begins to slow down — there is less room for the controller to perform wear levelling and maintain write performance. Storage Sense (configured in Section 1.4) handles routine cleanup. For a more aggressive one-time clean:

• Delete the Windows.old folder (Settings → System → Storage → Temporary files → Previous Windows installation(s)) — this folder can occupy 15–30GB after a feature update
• Clear the Download folder manually
• Uninstall applications you have not opened in six months (Settings → Apps → Installed apps → sort by Last used)

5.4 Check for Malware Regularly

Windows Security (the built-in Windows Defender) is genuinely capable and requires no third-party antivirus on a standard home machine. Keep it on and updated. Run a full scan monthly:

Windows Security → Virus & threat protection → Quick scan (daily, automatic) → Scan options → Full scan (monthly, manual).

Avoid the category of "PC cleaner" and "performance booster" applications — the vast majority offer minimal genuine benefit, frequently generate alarming false positives to drive paid upgrades, and some install additional unwanted software.

5.5 Restart Regularly

Hibernation and sleep accumulate background process clutter, memory fragmentation, and deferred update tasks. A proper restart (not shutdown and power-on, which uses Fast Startup's hibernation state) clears all of this. Restarting once every few days — or after any major software install — keeps the system fresh.

If you need persistent sessions across restarts, use Sleep. If you want the memory-clearing benefit, always use Restart, not Shut down.

Quick Reference: Optimisations by Scenario

For a slow general-purpose PC: Disable startup apps → switch power plan to High Performance → reduce visual effects → enable Storage Sense → update GPU and chipset drivers.

For a low-end PC with 4–8GB RAM: All of the above, plus disable SysMain (Superfetch) → reduce visual effects aggressively → disable background app activity → set a fixed page file.

For a gaming PC: Disable VBS/Memory Integrity → enable HAGS → switch to Ultimate Performance power plan → enable Game Mode and Windowed Game optimisations → disable Xbox Game Bar and DVR → enable Resizable BAR in BIOS.

For a privacy-focused setup: Set diagnostics to Required only → disable Advertising ID → disable Recall and Activity History → audit app permissions → switch to a local account → use O&O ShutUp10++ for a one-click sweep of remaining telemetry toggles.

For a laptop (battery-focused): Use Balanced power plan on battery → disable HAGS (saves power) → enable Storage Sense → disable high-impact startup apps → reduce display brightness and refresh rate when unplugged.

A Note on Third-Party Optimisation Tools

Third-party "PC optimisers" are a mixed category. A handful of tools are genuinely useful:

O&O ShutUp10++ — A free, no-install tool that presents every Windows telemetry and privacy toggle in one screen with Microsoft's official explanation of each. Updated for 24H2. Safe for all skill levels.

Display Driver Uninstaller (DDU) — The industry standard for completely removing GPU drivers before a clean reinstall. Essential when resolving driver conflicts or switching GPU brands.

HWiNFO64 — For monitoring CPU, GPU, RAM, and temperature data in real time. Useful for diagnosing thermal throttling, which is one of the most common causes of gradual performance degradation on laptops.

LatencyMon — Diagnoses real-time audio and system latency issues. Useful when identifying which driver is causing DPC latency spikes.

Everything else — registry cleaners, "RAM optimisers," and apps that claim to "boost" your PC with a single click — is noise at best and harmful at worst. Windows 11's built-in tools handle disk cleanup, startup management, and system health monitoring effectively. The changes that actually improve performance are configuration changes, not applications.

Final Thought

The most impactful Windows 11 optimisations are free, reversible, and take under an hour to apply. Disable startup apps, fix your power plan, update your drivers, and reduce telemetry — and most machines will feel noticeably different within the same session.

The advanced tweaks — disabling VBS, enabling HAGS, configuring Resizable BAR — are genuinely meaningful for gaming and high-performance workloads, but require slightly more care and context-sensitivity.

None of this requires reinstalling Windows, wiping your system, or purchasing any software. It requires reading, a few minutes per setting, and a restore point created before you start.

All steps tested on Windows 11 24H2 as of June 2026. Settings paths and feature availability may vary by Windows edition (Home, Pro, Enterprise) and build version. Always create a system restore point before making registry or service changes.