Spyware Doctor Starter Edition with AV is a good free antispyware from PCTools.
Read more
herehttp://www.pctools.com/spyware-doctor/
If you wanna pay, buy Spyware Doctor Paid Version.
Download
Threatfire . It is also a good security mechanism and it's free too.
For more information go to
http://www.threatfire.com/
Visit
PCTools fo more