A fresh Windows 11 installation feels fast. Six months later, the same machine can feel sluggish — longer boot times, stuttering apps, and a spinning cursor that never seems to stop. The good news: most of the slowdown is fixable without any hardware upgrades.
1. Disable High-Impact Startup Programs
Every app you install wants to start with Windows. Over time, your startup list becomes a graveyard of app launchers, update daemons, and cloud sync services that each steal a fraction of RAM and CPU before you have even opened a single window.
To audit them: press Ctrl + Shift + Esc to open Task Manager, click the Startup apps tab, and sort by "Startup impact". Disable anything marked High that you do not need immediately on boot — chat apps, creative suites, manufacturer update utilities, and game launchers are the usual culprits.
Leaving only essential items (your antivirus, audio drivers) will shave 30–90 seconds off most boot sequences.
To audit them: press Ctrl + Shift + Esc to open Task Manager, click the Startup apps tab, and sort by "Startup impact". Disable anything marked High that you do not need immediately on boot — chat apps, creative suites, manufacturer update utilities, and game launchers are the usual culprits.
Leaving only essential items (your antivirus, audio drivers) will shave 30–90 seconds off most boot sequences.
2. Clean Up Junk Files
Windows accumulates temporary files, old Windows Update packages, crash dumps, and browser caches that can easily total 5–20 GB. While storage is cheap, these files scatter across your disk and can slow file-system operations over time.
The built-in tool is Disk Cleanup (search it in Start). Run it, then click "Clean up system files" to also remove old Windows Update files — these alone can be several gigabytes.
For a deeper clean, tools like WhaleClean scan additional locations that Disk Cleanup misses, including application caches, log files, and Windows error reports.
The built-in tool is Disk Cleanup (search it in Start). Run it, then click "Clean up system files" to also remove old Windows Update files — these alone can be several gigabytes.
For a deeper clean, tools like WhaleClean scan additional locations that Disk Cleanup misses, including application caches, log files, and Windows error reports.
3. Adjust Power Plan to High Performance
Windows 11 defaults to a "Balanced" power plan, which throttles CPU frequency when it thinks you do not need full power. On a desktop or a plugged-in laptop, this is rarely what you want.
Open Settings → System → Power & Sleep → Additional power settings (or search "power plan" in Start). Select High performance or Ultimate Performance if available. On laptops, switch to this profile when plugged in and back to Balanced on battery.
Open Settings → System → Power & Sleep → Additional power settings (or search "power plan" in Start). Select High performance or Ultimate Performance if available. On laptops, switch to this profile when plugged in and back to Balanced on battery.
4. Enable Storage Sense (and Keep It On)
Storage Sense is a built-in Windows feature that automatically deletes temporary files, empties the recycle bin after 30 days, and removes unused downloaded files. Think of it as a lightweight auto-cleaner.
Go to Settings → System → Storage and toggle Storage Sense on. Click "Configure Storage Sense" to set how aggressively it runs. Set it to run "During low free disk space" or "Every month" for a good baseline.
Go to Settings → System → Storage and toggle Storage Sense on. Click "Configure Storage Sense" to set how aggressively it runs. Set it to run "During low free disk space" or "Every month" for a good baseline.
5. Update Your Drivers
Outdated graphics, network, and chipset drivers can cause stuttering, high CPU usage, and unexpected freezes. Windows Update handles some driver updates, but it often lags behind what manufacturers release directly.
For graphics cards: download NVIDIA App or AMD Software and update through them. For everything else: go to your motherboard or laptop manufacturer's website, find your model, and check the Drivers & Downloads section.
Driver Center in WhaleClean shows all installed drivers with their dates so you can quickly spot what is stale.
For graphics cards: download NVIDIA App or AMD Software and update through them. For everything else: go to your motherboard or laptop manufacturer's website, find your model, and check the Drivers & Downloads section.
Driver Center in WhaleClean shows all installed drivers with their dates so you can quickly spot what is stale.
6. Increase Virtual Memory (Page File)
If your PC has 8 GB of RAM or less and you run memory-hungry apps, Windows may run low and start using your SSD/HDD as overflow memory (the page file). If the page file is too small or fragmented, you will see performance dips.
Search "Adjust the appearance and performance of Windows" → Advanced tab → Virtual Memory → Change. Uncheck "Automatically manage" and set a custom size: initial = 1.5× RAM in MB, maximum = 3× RAM in MB.
Search "Adjust the appearance and performance of Windows" → Advanced tab → Virtual Memory → Change. Uncheck "Automatically manage" and set a custom size: initial = 1.5× RAM in MB, maximum = 3× RAM in MB.
7. Turn Off Visual Effects
Windows 11's animations and transparency effects look polished but add CPU/GPU overhead on older hardware. You can disable them without changing the OS's functionality.
Search "Adjust the appearance and performance of Windows" and choose "Adjust for best performance" to kill all effects, or pick custom to keep a few nice ones (like font smoothing and thumbnail previews) while disabling the rest.
Search "Adjust the appearance and performance of Windows" and choose "Adjust for best performance" to kill all effects, or pick custom to keep a few nice ones (like font smoothing and thumbnail previews) while disabling the rest.
8. Scan for Malware
Browser hijackers, adware, and cryptominer payloads are some of the most common causes of unexplained slowdowns. They run silently in the background, consuming CPU cycles and network bandwidth.
Windows Defender is solid for real-time protection. Run a full scan from Windows Security → Virus & threat protection → Scan options → Full scan at least once a month. WhaleClean's Protection module augments Defender with a 350,000+ hash threat database and lets you drop any suspicious file for an instant verdict.
Windows Defender is solid for real-time protection. Run a full scan from Windows Security → Virus & threat protection → Scan options → Full scan at least once a month. WhaleClean's Protection module augments Defender with a 350,000+ hash threat database and lets you drop any suspicious file for an instant verdict.
9. Use an SSD (If You Have Not Already)
If you are still running Windows from a spinning hard drive, no amount of software optimisation will make it feel truly fast. An SSD is the single biggest real-world performance upgrade you can make — boot times drop from 60+ seconds to under 10, app launches become instant.
SATAs SSDs are cheap (under €50 for 500 GB) and easy to clone from your existing drive using free tools like Macrium Reflect Free.
SATAs SSDs are cheap (under €50 for 500 GB) and easy to clone from your existing drive using free tools like Macrium Reflect Free.
Do It All in One Click with WhaleClean
WhaleClean handles steps 1–3 and 5–8 automatically — startup manager, junk file cleaner, driver center, and real-time threat scanner all in one free app. Download it and run a full clean in under five minutes.
Download WhaleClean Free