In the run command window type %temp% and it will bring up all the temp files stored on your computer. You do not need them so go to Edit and click on Select All then go to File and click delete. Also I found this free program that will clean up registry files. It does a great job.
http://www.eusing.com/free_registry_...ry_cleaner.htm
Another free program I use is called PC Fixer.
http://www.digitalsupporttech.com/