how can i remove this "BV: Malware-gen"..???

???
???
???

please help me… the
file name: C:\WINDOWS\pc-off.bat
Malware name: BV:Malware-gen
Malware type: Virus/Worm
VPS version: 090528-0, 05/28/2009

is always occuring on my screen…

i think it started when i insert my brother’s flash drive on my cpu…

i can’t delete it on my avast 4.8…

i did alloptions on my avast but stil i cant totally remove it…

pls help…

tnx…

Hi zacq02, welcome to the forum.
Without the full path and original file name, I can only offer help based on searching the internet for this.
I would recommend a boot scan with Avast, or you could try a manual removal (including the flash drive) by having a look at these sites:
http://hubpages.com/hub/How-to-remove-Bar311
http://answers.yahoo.com/question/index?qid=20080223235228AAI6zrB
Both offer fairly clear directions.