run hijackthis and post the results if you can't interpret them, that should tell if it's an ie/media player virus or not. other than that, update your virus definitions, run spybot s&d, adaware, and, if you have a little more technical knowledge, tds-3.
links to above-mentioned progs:
spybot search and destroy:
safer-networking.org
adaware:
http://www.lavasoftusa.com/software/adaware/
hijackthis:
http://www.spychecker.com/program/hijackthis.html
tds-3:
http://tds.diamondcs.com.au/
hope this helps