CCleaner Won't Start? in CCleaner Bug Reporting Posted July 3, 2010 · Report reply Well it's obvious from the few scans I've run that I have some kind of malware in my registry, which explains the software issues. Obviously, it's blocking any changes that can be made to the registry to protect itself. I'll post a thread in the malware forum after I finish all the scans and... get a night's sleep, lol. It's about 2:40 am for me, I think I'll continue tomorrow.