Is your Windows PC noticeably slower after installing a recent update? It's common for new patches to affect performance. In other cases, the update doesn't break Windows—it just breaks something in Windows. The good news is that most of these slowdowns aren't permanent and are easy to sort out.
Give the update time to settle down
If your PC feels slow right after installing an update, give it a little time to settle down. Windows often runs post-update tasks in the background—such as search reindexing, file optimization, component updates, and security changes. These processes can spike your CPU, RAM, or disk usage to 100%, which naturally slows everything down.
My recommendation: leave your computer idle for about 30 minutes to allow Windows to complete its tasks. Then restart once more to trigger any final optimizations. If things return to normal afterward, you're good. But if your system still feels sluggish even after waiting a few hours, the issue is likely deeper—so move on to the fixes outlined below.
Ensure the update isn't to blame
If the slowdown isn't just a one-time hiccup, the first thing to check is whether the update itself is the culprit. When a Windows update is buggy, you won't be the only one dealing with performance issues—you'll usually find plenty of similar complaints online. To verify that, you'll need the KB number for the update. Right-click the Start button, then open "Settings."
Then, go to Windows Update > Update History. Note the KB number of the most recent update, then search online to see if others are reporting the same slowdown. If it's a widespread issue, the update is likely at fault , so uninstall it and wait for Microsoft to release a fix. Even if the problem is affecting only your PC, roll back the update to confirm whether it's the cause.
Uninstall the most recent update
Microsoft makes it easy to uninstall a problematic update . Right-click the Start button, open "Settings," then go to "Windows Update" and open "Update History." Scroll down and click "Uninstall Updates" to see a list of recent installations. Find the update that matches the KB number you noted earlier, select it, and click "Uninstall," then follow the on-screen instructions.
If the update was buggy, uninstalling it should restore your system's performance. If removing it doesn't make a difference, that confirms the update isn't the cause. At that point, you can continue with the remaining fixes—and even reinstall the update manually if you'd like, since it's no longer the likely cause.
Free up space on your drive
Less often, performance drops after an update simply because your system drive is running low on free space. Windows needs additional free space to unpack files, rebuild caches, and run background optimizations; if the drive is nearly full, performance can suffer. So, check if your OS drive is running low on space—and if it is, clear some storage .
Start by uninstalling apps you no longer use. Go to Settings > Apps > Installed apps and uninstall anything you haven't touched in a while. Click the three horizontal dots next to the app and select "Uninstall."
Next, go to Settings > System > Storage, open "Temporary Files," and delete items such as Windows Update Cleanup, Delivery Optimization Files, and other temporary data.
You can also move large files, such as videos, photos, or backups, to another drive and enable Storage Sense. Ideally, leave at least 15–20% of the drive free to ensure smooth performance.
Check what the update might have changed
Windows updates can sometimes reset settings, turn background features back on, or change how specific components behave. As a result, the slowdown you're noticing may be due to system tweaks made during the update process. Open Task Manager, go to the "Startup Apps" tab, and ensure no unnecessary apps are re-enabled.
Next, go to Settings > System > Power & Battery and confirm that your preferred power mode—ideally Best Performance—is selected.
Also, disable any background app permissions that were turned on unexpectedly. Go to Settings > Apps > Installed Apps, tap the three-dot menu next to an app, select "Advanced options," and set Background app permissions to "Never."
Finally, verify that visual effects or other performance-impacting options haven't been automatically enabled. Turn off any other settings the update may have enabled.
Fix only the parts of your PC that feel slow
Is your whole system actually sluggish, or is the slowdown limited to a specific area? Sometimes a Windows update only affects one or two components. In that case, it's better to apply targeted fixes rather than make system-wide changes. For example, if boot times are slow, disable unnecessary startup apps and review any BIOS or boot-related settings.
If File Explorer feels laggy, try restarting it, clearing its cache, or adjusting its settings. If search is slow, stuck, or missing results , rebuild the index, restart related services, or check for permission issues. If the problem is visual—such as stuttering or low FPS—focus on graphics drivers or display settings. Identifying what's actually slow helps you fix the problem faster.
Most post-update slowdowns are temporary and disappear once Windows finishes its background tasks. Sometimes, though, a buggy update is to blame—and uninstalling it restores performance right away. In other cases, an update may tweak or break specific settings, and fixing those is all it takes to get things running smoothly again.
