CCleaner, its current version 5.65 and likely some earlier versions, has a compatibility problem with 0patch resulting in ccleaner.exe or ccleaner64.exe processes occasionally crashing. We were only able to reproduce this immediately after installation of CCleaner but some users reported crashes while using CCleaner.
A. Excluding CCleaner.exe and CCleaner64.exe in 0patch.
- As administrator, set registry value ExcludeModules under HKEY_LOCAL_MACHINE\SOFTWARE\0patch to "CCleaner.exe|CCleaner64.exe"
- Restart 0patch Service
B. Using older CCleaner, as suggested by some forums as a solution for crashing with other security products. We confirmed that version 5.40 (https://download.ccleaner.com/ccsetup540.exe) didn't result in any crashes after installation.