I have been using the cleaner portion of cccleaner for a long time.
I recently bough TrendMicro Internet security. It brought my macine to its knees. The removal process is flawed. Reading through online posts I had their tech support help me fix my registry. It has been a nightmare.
The PC is back and working but it was suggested I look at my registry using cccleaner. When I scan for issues there are dozens ... all types. I am not blaming this all on TrendMicro but I would like to clean up the registry.
Of course not being a pro PC user ... touching the registry at all makes me nervous.
Is there some documentation I can read on the cccleaner registry options? What is something goes wrong?
I should be a little careful when modifying the registry until you're more familiar with it. I believe that CCleaner is a fairly safe registry cleaner, erring on the cautious side, but it's best to backup of course and then just clean a few known things at a time until you are more confident (I don't have a clean registry, I'm a little cautious too). If you see anything that obvoiusly belongs to software you no longer have, such as - in my case - AOL or McAfee, then clean that up. Delete entries one at a time and look at the reason that CC gives, if it says left over from an install or removal then it is probably OK to get rid of it.
I don't think that an untidy registry slows the PC down much, if at all. I guess the registry is indexed so the spare entries don't really do any harm, except as an afront to your sense of tidyness.
I shouldn't think that CCleaner would cause any problems with cleaning the registry. I would make sure your system restore is functioning and up to date. Then if you find any problems or things don't work correctly you can always do a system restore.
Make sure that in Options\Advanced that Show prompt to backup registry issues is checked then you can always save a reg file for what is removed. You just double-click on the saved reg file to put the registry back have it was before.