I'm trying to install CCleaner and get as far as the install options (Add shortcuts, etc.) then as soon as it starts installing, it stops without any explanation or error message. I've tried disabling windows firewall, AOL (McAfee) anti-virus and antispy with no effect. What could be causing this? Thanks!
Have a look here
http://forum.piriform.com/index.php?showtopic=5739
Also I am assuming you chose save, when downloading, and not run.
You could also try another install, here is a good place to download it from.
http://www.CCleaner.com/download/builds.aspx
Wecome to the forum