Afraid so. Not much we can do once virut gets on it. I've seen a few post where people claim they fixed it but I'm not sure I believe them. Virut is a file infector so every time you use a file it get a little piece of virut code added to it. Cleaning a file is not trivial and cleaning a whole PC seems beyond most tools. Your only chance would be to boot off a cd like BartPE and run the two tools that claim to get rid of virut but there is no certainty that you have a version of virut that they can handle.
The good news is that your PC is only 4 months old so reverting back to the way it came from the factory should not be so tragic. Hopefully it either came with disks or has a hidden partition which you access during boot - usually with F12 but it may vary. IF you didn't get disks and it doesn't have a recovery option at boot then contact the manufacturer and ask for the cds or dvd. Usually they will send them for a nominal charge.
Once you reload go immediately to windows update and start downloading all of the patches. Do not go anywhere until you have the full set then go to http://www.avast.com...avast-home.html
and get the free avast anti-virus.
I'd also get the free WinPatrol 2010 from http://www.winpatrol.com/download.html
It's a small program that will sit in your systray and warn you if something tries to make changes to your system.
IF you use a USB drive then you might want to install Autorun Eater v2.4. http://oldmcdonald.w...orun-eater-v24/
Another small program which will stay resident and prevent an infected USB drive from infecting your PC.
Then get Firefox http://www.mozilla.c...x/personal.html
and make sure you get the AdBlock Plus Add-on.
Don't let the kids install any p2p software such as Limewire, bittorrent or similar. These are prime sources of viruses.
It's also best if you put a password on any administrative logins and create a standard user login for the kids to use. That way it will limit what damage they can cause.
Keep your Java uptodate and remove older versions if it doesn't do it automatically.
Also make sure you have the latest versions of any adobe.com products you use like Shockwave, Flash or Acrobat. Adobe is fond of foisting GetPlus on you. You can let them install it and then afterwards, go into Control Panel, Add/Remove Software and remove it. It probably doesn't hurt to leave it but I don't see the need for it and it has caused problems in the past.