I don't believe format is the best solution. Please try A Squared first. It never failed me before.

http://www.emsisoft.com/en/software/free/

Please disable your system restore first and maybe do a manual clean in safe mode if still fail. Refer to this:

http://www.antivirusworld.com/articles/virus/qhost.php

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Added on September 26, 2009, 4:13 pmBTW please disable your LAN @ internet access while you are cleaning

This post has been edited by gyver: Sep 26 2009, 04:13 PM

It doesn't matter what type of antivirus you use. As long as can detect and clean, then it is ok. Some can detect and then you have to manually remove.

But if you are stuck like TS, it doesn't hurt to try and download all these free tools first rather than reformating. Reformating is like old school win98 days

After cleaning don't forget to uninstall the tools. No use keeping them as TSR since resource hogging only.