No wurries!
I invested $20 in a program called Advanced System Care which does all the cleaning up and tuning up of your system automatically. Also has a hard disk defrag program that is very helpful. You might like to give them a try.
http://www.iobit.com/advancedwindowscareper.html and no, I don't have any connections with Iobit!
There's a free version
and the $20 version that has all the bells and whistles.
Cheers
Chris