Yes trying a different software or reinstalling sounds wise. At least just to check. There are forums you can go to get assistance for removal of any such viruses, etc. you may have encountered. Bottom of this page http://www.gnutellaforums.com/open-d...uld-aware.html step 5 in red shows options to choose. You can get 'Hijack This' assistance.

Yes the viruses might have damaged WMP/iTunes & after removal of the virus(s) may need reinstalling.