I have been using CCleaner (aka “Crap Cleaner”) for many years. It's been great for clearing my internet cache over multiple internet browsers like Firefox, Internet Explorer, and Google Chrome (my new favorite and go-to web browser).
It's also been fairly good at finding registry errors in Windows. It's been a bit disappointing in fixing them, though.

I have found something better — JetClean.
It seems to clean the internet cache just as well, it finds and fixes registry errors in Windows, and it's a LOT faster.
Check it out and tell me what you think in the comments.
Did I mention it's free? Yes, they have a free version (the version I'm using) and I love it!
Try Jet Clean today.