WindowsClearCache

Simple scripts to clear temp files, browser cache/history, caches for applications like Microsoft Teams, Slack, Discord, Opera, and OneDrive, and remove Windows Defender scan and definition update backups (including the NisBackup folder), Windows dump files, and Windows Error Reporting (WER) temp files

Installation

1. Build the graphical installer by running makensis WindowsClearCache.nsi (or download a pre-built WindowsClearCacheInstaller.exe).
   • A GitHub Actions workflow builds the installer and attaches it to a release when you push a tag such as v1.0.0.
2. Run WindowsClearCacheInstaller.exe as an administrator.
   • The installer launches cleanmgr.exe /sageset:1 so you can configure Disk Cleanup before the first run.
   • You can choose to create a weekly scheduled task that runs the cleanup with highest privileges.
   • The cleaner script is copied to c:\Program Files\WindowsClearCache.

How To Run

After installation you can run the cleaner manually with: powershell.exe -ExecutionPolicy Bypass -File "%ProgramFiles%\WindowsClearCache\DriveClean.ps1"

Optional flags:

• Use -DryRun to preview the files that would be deleted without removing them.
• Use -Verbose to display each file as it is deleted (or would be deleted in dry run).
• Use -IncludeUsers to target specific active user profiles.
• Use -ExcludeUsers to skip particular user profiles.
  • -IncludeUsers and -ExcludeUsers are mutually exclusive.
• Use -CleanSystem:$false to skip clearing system caches.
• Use -CleanUsers:$false to skip clearing user profile caches.
  • CleanSystem and CleanUsers cannot both be set to $false.

Uninstallation

Run Uninstall.exe from c:\Program Files\WindowsClearCache or use Add/Remove Programs. This removes the scheduled task and deletes the installed files.

Tested on following Windows Versions

Verified on the following platforms:

Windows Version	Yes/No?
Windows Server 2025	Yes
Windows Server 2022	Yes
Windows Server 2019	Yes
Windows Server 2016	Yes
Windows Server 2012 R2	Yes
Windows Server 2012	Yes
Windows Server 2008 R2	Yes
Windows Server 2008 SP2	Yes
Windows Server 2008	No
Windows Server 2003	No
Windows 11	Yes
Windows 10	Yes
Windows 8	Yes
Windows 7 SP1	Yes
Windows 7	No
Windows Vista	No
Windows XP	No
Windows 2000	No

It is likely to work on other platforms as well. If you try it and find that it works on another platform, please let me know.

Requirements and Limitations

• Requires PowerShell 5 or later and administrative privileges.
• Disk Cleanup (cleanmgr.exe) and DISM may be installed. These tools are present when the Desktop Experience feature is enabled and are not available on Server Core installations, which are required for native Windows optimizations.
• The Windows Update service should be available to allow cache cleanup.

Disclaimer

WARNING: I do NOT take responsibility for what may happen to your system! Run scripts at your own risk!