worm vb.bxs removing avast from taskbar?

Hello,

First of all, i’m french, please excuse me for my poor english…

I’ve got avast 4 Familial edition on my PC (Win XP). When I started my computer this morning, avast was not available anymore :s It seems that a worm (worm vb.bxs) is deleting it when avast goes in the taskbar when Win XP is starting. I can’t reinstall avast anymore neither any other antivirus…

I do not know what to do! Please help me.

Thank you so much

Welcome to the forum Fred0877. Your English is much better than my French :slight_smile:

Please download and scan with the free version of AVG AntiSpyware and post the results of the scan in your next response

http://free.grisoft.com/doc/20/lng/us/tpl/v5

Do you have a firewall?