I have been unable to "exit" Trend Micro on the last few passes. Also: here's my workaround: find the setup file for CCleaner (setup.exe) in Program Files/Setup.
Create a shortcut to that file on your desktop or task bar. When you run setup, it will re-install CCleaner. At the end of the reinstall, you have the option to run CCleaner (and see the version notes, etc.) Run CCleaner. It seems to run an earlier version, but it works. And, on my system, it doesn't take much longer than running thru the usual "analysis" stuff.