You might as well save your data files and simply reformat and reinstall Windows. Only this time dual boot your computer or run VMware with Linux and forbid Windows to use the internet period. Linux can do that for free and you won't have to go pay Apple for anything.
BTW, the virus-scan website you were hijacked to in the first place is the virus/worm that has infected Windows. The virus you have can't be removed without a major ordeal and you'll be lucky to get the registry items that it has infected. The truth about that one is that it morphs and changes every time you reboot Windows. The day I got that one just over 2 years ago was the day I started using Linux exclusively at home. I use Windows locally and it is strictly prohibited from any internet activity outside of going to Microsoft for whatever updates they have every month. That is a manual process I have implemented too. I haven't regretted that policy to this day.
Here's an example of how bad Windows really is and even these "swear by virus and trojan softwares":
Remove Worm.Netsky (or Netsky Virus) (Removal Instructions) 411-Spyware.com
You wind up needing to buy one product to detect the virus/worm, These product(s) don't automatically remove it and what other methods are tedious to implement if they even work at all. So you spend even more time and money trying to find one that's really worth a shit, only to find the rest are no better than the one's you bought in hopes of getting rid of something that is terminal ! So what is the only solution, use Linux to surf the internet ! That guy seems to swear by SpyHunter, but even he indicates it's limitations:
"I’m a big fan of SpyHunter. Here’s why: SpyHunter offers live support on the phone, and if SpyHunter doesn’t automatically remove Worm.Netsky (or Netsky Virus), you can get a custom fix for your computer."
Yeah, he says SpyHunter won't automatically remove it, then he throws this 1/2 assed assurance for a custom fix for a software that is massed produced/installed like Windows is ? And as you can see on that website, there's your confusing custom solution ! I'm skeptical, so I'd rather eliminate the problem altogether, Microsoft on the internet ! Outlook and Outlook Express too, not just Internet Explorer ! There's only so much FireFox can do on a Windows system too !
Linux and Novell Evolution are more secure. Apple's stuff is relatively secure just the same, but that entails hardware and software changes that aren't cost effective. For the time it takes to download Linux, burn it to a cdrom and install it, you'll be out the time of a download and cost and time of burning a cdr, maybe even the time it takes to learn how to install it. In the end you may realize that your employer can deal with Windows, but for home/personal use, you'll never have to buy software ever again ? If you can use Windows or OS X, Linux isn't much different or any more difficult.
This post is the product of Ubuntu Studio 8.04 using Firefox 3.