Hi,

I think you may have a virus or trojan.
http://securityresponse.symantec.com/avcenter/venc/data/backdoor.dvldr.html
 
Try these two scanners online

Trend Micro Housecall      http://housecall.trendmicro.com/
http://www.ravantivirus.com/scan/indexie.php

Post back if this does not fix it