RUXIM is legitimate Microsoft software in C:\Program Files\RUXIM, installed by the Update Health Tools / Windows Update. It uses almost no space or resources. Leave it alone; it's reinstalled by updates if deleted.

Why this happens

The folder contains PLUGScheduler.exe and related files, run by a scheduled task to decide whether to show Windows Update notifications. It arrived with Windows 10 updates (KB5001716 and later) and also exists on Windows 11.

Deleting it doesn’t speed anything up and Windows Update typically restores it. If it causes notifications you don’t want, adjust notification settings instead.

Signs of the problem

  • A folder named RUXIM in C:\Program Files.
  • PLUGScheduler.exe or a 'PLUG' scheduled task appears.
  • Upgrade or end-of-support prompts from Windows.

Common causes

  • Installed automatically by Windows Update / Update Health Tools.

Fixes to try, in order

  1. Confirm it's genuineRight-click PLUGScheduler.exe → Properties → Digital Signatures: it should be signed by Microsoft Corporation.
  2. Leave it in placeIt uses little disk space and runs only briefly via Task Scheduler.
  3. Manage notifications insteadAdjust Settings → System → Notifications and Windows Update's notification options if prompts bother you.
  4. Scan if unsignedIf the files aren't Microsoft-signed, run a full Microsoft Defender scan.
How to confirm the fix: The executables show a valid Microsoft signature.

Prevent it from coming back

Keep Windows updated; avoid 'debloat' scripts that delete system components.