CCleaner is fully compatible with every publicly released version of the Windows 10 OS but despite this, you may receive a message that is similar to the following:
This happens during major Windows 10 update installations and specifically, whenever there is an update for the Compatibility Assistant.
Fortunately this issue is easily resolved by downloading and reinstalling CCleaner from the following links:
- If you're a Free user, please download CCleaner from the following link:
- If you've paid for CCleaner Professional, please download CCleaner Professional from the following link:
If you need to locate your license key, you can use our license key lookup tool here:
Note: If downloading and reinstalling does not work, you may be required to uninstall CCleaner, prior to the reinstallation.