I recommend not paying for or using that registry cleaner. You might fix 486minor "problems" but create 3 large ones.

Instead, list out each individual problem you're having and find solutions for each; it's possible that a couple may have the same solution.

IME, it's the individual user the causes 90% of the problems on their computer, usually by: 1) poor browsing habits, 2) disinterest in what downloaded applications are actually installing/doing, 3) failure to run the basic maintenance tools (defrag, chkdsk, temp file cleanup, spyware scans, a/v scans) on a regular basis to keep they're computer running properly, and 4) implementing improper fixes and messing things up even more.

There is no magical tool that will resolve oddities and glitches with your computer.