I should have mentioned the Hijack this for you also.

you can download it from cnet or other safe sites
or here-
http://free.antivirus.com/hijackthis/

just run the scan and see what shows as running - there is an info section near the bottom to highlight each thing & check it - or I open a browser and google them if I don't get enough info.

also there's a Hijack this forum where you can learn more and/or share your list if you want to.
many of the top pc security sites have various free prgms to scan/clean etc..

a few -
http://support.kaspersky.com/viruses
http://www.bitdefender.com/freetools/
http://www.comodo.com/business-secur...essentials.php