|Over the years we have had many problems which came along after folk used System Mechanic. Avoid all those things, they are unnecessary and cause more problems than they fix.|
CCleaner is one of the safest but by no means essential. Anything to do with registry cleaning should either be avoided or used with extreme care by folk with some knowledge in that area.
As for ASC try this on it (free version at bottom of page):
Always pop back and let us know the outcome - thanks