Additional info:
Are you running with Administrator privileges ?
Have you tried Run AS ?
If I log on as Administrator, or log on as Standard User and run As Administrator, or log on as Standard User and input password at UAC prompt, CCleaner runs, but only cleans the Administrator account. No apparent way to clean the Standard User account.
CCleaner version ? 2.09
OS,edition ,32bit or 64bit and version ? Windows Vista Business, 32 bit, no service pack, on Dell 690 with 2gb RAM
Browsers and ver.? IE7
Security software and ver? AVG 8
1 Administrator account, 1 Standard User account
Thanks for trying to track this down.