Few months ago I also got infected with it (Same reason as yours..)... Amvo is a Trozen Horse..., It disables your Registry and MSConfig too...
http://www.greatis.com/reanimator.zip
It can remove the Trozen I think...
Or else..
1.) Download AD-Aware + SpyBot S&D + Kaspersky...
Install Them,,
1.1) Download this Tool...
http://en.sergiwa.com/modules/news/a....php?storyid=2
This will remove all restriction like "You not able to view hidden files."
2.) Boot In Safe Mode...
3.) Delete All Suspected Files... (Amvo.exe, Amvo.dll etc..)
4.) Run Above Mentioned Softwares..
5.) Clean or Delete every infected file ( Chances are many IMP files are infected now...)
6.) Reboot...
I think u will be safe now..
7.) Get a better Anti-Virus like Kaspersky.
Edit := You may also want to check this link :=
http://www.prevx.com/filenames/13607...EIECT.COM.html