You can start with these which are all free and if you still have problems, post back with more specifics and we'll see what we can do to help.
Spybot S&D (download, check for updates, read the tutorial and scan often, it also does some blocking)
SpywareBlaster (a blocker only, download it, check for updates, enable it and leave it alone except for checking for updates occasionally)
SpywareGuard (similiar to SpywareBlaster but works in a different way and does not update as often for that reason.
Ad-Aware SE (a scanner, download, check for updates, read the directions and scan.
cwshredder (stand alone unit)(another small scanner for certain things, ALL other windows should be closed)
Also do an online scan at one or all of these.
On the first one, make sure you checkmark the box that says "autoclean"
Housecall (using IE with Active-X)
Housecall (all browsers using java)
Would someone please help a neophyte like me find some VALID and free spyware removal software. I am a conservative user of the internet, but my computer has spyware on it, I'm almost certain. It continues to click OFF the internet and it is NOT my ISP's fault, according to them. Also I have noticed that the "shut down windows display box" has RESTART always selested. I know I don't select it. HELP PLEASE! THANK YOU!