When I try to start the cleaner (v.545) I get a popup message that the program closed down. After several tries, I uninstalled the program and tried to reinstall it. I stored the setup program on my hard drive but when I try to start the program it fails to start. I'm running Windows 7 Home Premium. What's wrong?
What anti-virus are you using?
Build 5.45 has been removed from Piriform downloads because of several issues.
The previous build 5.44 can be downloaded here
I am also having this problem. I am using the paid version of CCleaner and Kaspersky Security Suite. Both are updated. The problem just started a few days ago as far as I can tell. I've checked my settings in each program, tried uninstall/reinstall of CC, tried running "slim version", tried running 5.43, nothing worked. I went to Kaspersky's forum and they insist it is a CC prob.
If you are using Kaspersky see here
https://forum.piriform.com/topic/52058-kaspersky-ccleaner-v54x-close-on-clean-work-around/
Thanks hazelnut, that worked.