In a note I write about Parasite removal programs, it's very important to note that all of them are without charge. Some look for such on Google and fall for a SPONSORED LINK which is in a nutshell the stuff you will pay for. Just skip those.
http://reviews.cnet.com/5208-6132-0.html?forumID=32&threadID=1313&start=0 notes the five scanning tools and removal tools that are fairly safe. If one does encounter an issue, its always been damage done by the MALWARE. The most common issue being Layered Service Provider replacement which you can use LSPFIX (Hint: use http://www.google.com to find).
The thread has follow on discussions about new links if you don't want to use Google to find an item.
Bob
PS. All the tools are free.
i am a new computer owner and i wouldl ike to know if there is a free program out there that will get rid of the cookies files ect so that my home page will not be hijacked and the tool bars will stop changing . i have ad ware and spy booth that i downloaded but it keeps happening

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic