This tutorial details the step-by-step guide on how to reset, clear, remove and delete the Windows thumbnails cache so that Windows will recalculate and regenerate the thumbnail previews again when you open a folder in thumbnail view or other views that display preview thumbnails. Deleting existing thumbnail cache is necessary if it’s corrupted such as not displaying thumbnail properly.
- Run Disk Cleanup by searching for Disk Cleanup or CleanMgr.exe.
- Select the drive that you want to clean up from the drop down list. The drive should be the one that Windows.old folder is located, which is almost always been the system drive of C:\. Hit OK to continue.
- Check (tick) the Thumbnails check box, then click or tap on OK.
- Click or tap on Delete Files button when prompted with warning on whether are you sure want to permanently delete these files.
- Once the cleanup is completed, Disk Cleanup will close itself.
Alternatively, you can also delete all the preview thumbnails cache database via Command Prompt. To do so, open an elevated Command Prompt as Administrator, and run the following commands:
taskkill /f /im explorer.exe del /F /S /Q %LocalAppData%\Microsoft\Windows\Explorer\thumbcache_*.db start explorer.exe