After Running CCleaner again, the problem re-appeared. I don't know exactly wich option is messing everything up. I hope in future versions it will be solved, I'm currently using the latest: v2.23.993. My SO is Windows 7 RTM 7600 x64 Ultimate. And my PC is a Intel Core i7 920 on a Gigabyte GA-EX58-UD3R.
(Sorry for my english, I'm from Argentina)