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
system
2
Welcome to the forum Fred0877. Your English is much better than my French 
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?