Reg. scanners are junk .and should never be used, and never download one to scan with Active X controls from the net. Never change registry as this could crash the pc.Windows has plenty of registry cells and address. C cleaner does great job of cleaning junk windows uninistall won't. An error doesn't mean its bad. It could be left from older programs and application identifiers no longer valid. Registry software that changes or modifies the hive is suspicious. A healthy registry only gets cleaned from bad entries, not "repaired"