I used ccleaner since it would help me to get rid of some problem and probably more that I were not aware of. At least, that was what I thought. So I made a system restore point (Vista) and runned ccleaner. But, things did not work as expected any more after that. So I started system restore to go back to my restore point. Unfortunately, system restore did not work any more either!
I am using CCleaner since a long time now and always satisfied.
Recently I have updated my Vista Enterprise to Service Pack 1. I then downloaded the last version of CCleaner v2.23.999 and run it out of the box like I usually do.
I unfortunately got the same problem as brac37. My system is now corrupted and the last known successfull boot doesn't work anymore.
I am getting a cyclic BSD followed by a reboot. Only the safe mode works.
It looks like the registry has been corrupted, maybe wipedout.
Is it a bug of this version of CCleaner or is it something releated to Vista SP1?
I am using also Deffragler since a long time but I am afraid to get the same issue again...
I'm not a Vista user, but there are/were an awful lot of problems stemming from updating to Vista SP1.
Maybe some of the info from these links may be helpful. The first one has a section referring to "The Endless Reboot Issue", and there are a lot of links embedded in the body of the text: