Have a look at the below removal guide. Scroll down to where you see "Automated Removal Instructions for ....", and follow all the steps. See if it helps.
How to remove XP Security Tool 2010, XP Defender Pro, and Vista Security Tool 2010 (Uninstall Guide)
In addition to the above, I would also suggest running a Complete Scan in Safe Mode with SUPERAntiSpyware. You can download SUPERAntiSpyware FREE VERSION for Home Users from here. After SUPERAntiSpyware loads, make sure to click the Check for Updates button, before running the scan.
Just prior to running both scans, temporarily disable NAV, so there's no interference. The same holds true, if you have Spybot's Teatimer running. It needs to be (temporarily) disabled.
Let us know how you make out. Or if you run into any problems along the way.
Best of luck and have a good holiday..
My computer has got a trojanfaleAV Virus (at least I think that's what it's called.) It's basically imitating windows vista security system and coming up every few minutes saying I'm being hacked etc. I did a Norton antivirus scan, which confirmed this. It said the threat had been fixed and I did not see it again for several hours. However, just now, it's come back, so obviously it was never gone in the first place.
I'm really worried about what it could do to my system and want to fix it fast. Obviously Norton can't fix it. I'm not great with technology, so I doubt I'd be able to fix it manually on my own. Are there any (ideally free) programs out there that can fix it for me?