click here and Regseeker from click here Use both and delete all they find. This *should* speed up the computer. You could also do a virus scan and a scan with MS Antispy click here as worms/adaware and Trojans can slow up a system.
Both excellent........Ccleaner's "Issues" registry cleaner is suitable for frequent use and RegSeeker is more thorough but still safe.Both will create a backup of items removed.....which I,ve not needed to use in the last 18 months.
If your machine is slowing down you need to check on your RAM memory usage....too many background programs or not enough RAM installed wiil noticabley slow your computer down.
Make sure if you have any cookies,that you want to keep IE: password cookies for this siteor others that you add them to the exclusions list or it will delete them,it's not a big deal but can be an hassle if you cant remember your details,lol.