Sampura, I agree totally: ?So I don?t recommend using CCleaner with Windows 7 64bit Ultimate, before this broblem is solved.? I had almost the same problem using Windows 7 Home Premium (x64) (build 7600), BIOS: American Megatrends Inc. 5.17 01/28/2010. And I NEVER even used REGISTRY CLEANING. To wit:
CCleaner V2.36.1233
Wiped out User Profile Registry
1. Ran CCleaner yesterday for cleanup of:
a. Internet Explorer - All options
b. Windows Explorer - All options
c. Systems:
i. Recycle bin
ii. Temp Files
iii. Clipboards
iv. Memory dump
v. ChkDsk File fragments
vi. (NO OTHER SYSTEM OPTIONS CHECKED OFF)
d. DID NOT CLEAN ANY REGISTRY FILES!
e. Glitch:
i. PC ran OK BEFORE running CCleaner.
ii. Upon reboot after running CCleaner, my PC WOULD NOT ACCEPT MY PASSWORD. COULD NEVER GET SIGNED ON.
iii. HP PC-Doctor found NO hardware problems.
iv. Have used CCleaner for many years, never a lost registry until yesterday.
v. Wiped out my Password in User Profiler Service Registry!
vi. Why: ???
vii. Afraid to use CCleaner again.
f. PC Desktop: HP-Pavilion AY608AAR-ABA HPE-137c, Windows 7 Home Premium (x64) (build 7600), BIOS: American Megatrends Inc. 5.17 01/28/2010 , 2.50 gigahertz Intel Core2 Quad Q9300
2. I am now NOT using CCleaner at all because of this problem! Stretch114