Preventing users from changing the Windows Theme with GP-Editor

gpedit
  1. Click the Start button and select Run. Enter “gpedit.msc”.
  2. Go to User Configuration >> Administrative Templates >> Control Panel >> Personalization look for a setting named Prevent Changing Theme and double-click on it.
  3. Select “Enabled” then click OK.
  4. Done, you may need to restart the computer to make it works.

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