Symptoms
- Storage shows unusually large 'Temporary files' or 'Other' categories
- Disk Cleanup finds a large amount of reclaimable space
- System feels sluggish despite adequate RAM and CPU
- Slowdown improves noticeably right after clearing temp files
Likely causes
- CommonWindows temporary files never automatically clearedThese accumulate from installs, updates, and normal system operation.
- CommonBrowser cache grown very large over timeCached images and scripts speed up repeat visits but can bloat over months of use.
- CommonOld Windows Update leftover files after multiple updatesThese are safe to remove once updates are confirmed installed successfully.
- PossibleApp-specific caches (photo editors, video players) growing uncheckedSome apps cache aggressively without an easy built-in cleanup option.
- PossibleRecycle Bin never emptiedDeleted files still take up space until the bin is emptied.
What to do
- Open Settings > System > Storage and review what's using space, particularly 'Temporary files.'
- Turn on Storage Sense to have Windows automatically clean temporary files on a schedule.
- Run Disk Cleanup (search in Start menu), select your main drive, and check all safe categories including temporary files and old update files.
- Clear your browser's cache from its settings menu (usually under Privacy or History).
- Empty the Recycle Bin once you've confirmed nothing important is in it.
- Check specific resource-heavy apps (photo/video editors) for their own cache-clearing option in settings.
- Restart the PC after a cleanup to let Windows reset relevant background processes.
- Repeat this cleanup every few months as routine maintenance.
Tools and parts
- None required
When to call a pro
This is simple routine maintenance you can do yourself; professional help isn't necessary.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.