A bad adware/spyware scanner that started out great years ago as "Ad-Aware SE PERSONAL" and slowly went bad to Ad-Aware 2007 and 2008. Decent detection of spyware but consumes too much memory and resources. Bad customer service, bad GUI, and extremely large for what it does. Secretly has a process running in the background and acts more like spyware than removing spyware. Takes forever to scan and doesn't usually finsish, instead it freezes and you'd have to start over.
I used Ad-Aware SE and it was awesome. Now, I use something else because I can't stand it.
A decent program by Lavasoft that scans and deletes/quarantines most spyware
and other malware
from your computer. There is a freeware version and two payed versions. The free version, Ad-Aware personal is a part of Google Pack.
All the crap in your computer is making it slow. Scan it with Ad-Aware. Or something better if you can.