No this isn't a virus, or at least, it isn't directly related to one.
This is most probably related to the fact that you have that Add/Remove Programs problem.
You can place spybot and free AVG on a USB drive, additionally, you can run a complete scan with NAV (Norton Anti-Virus) Boot Disk: This will check everything BEFORE booting to windows.
You will need a reliable source computer to work from since your main computer seems to be comprimised.
Article forAVG and instructions found here: http://www.computing.net/answers/security/avg-antivirus/17758.html
Microsoft does have an official Windows 7 Support Forum located here http://tinyurl.com/9fhdl5 . It is supported by product specialists as well as engineers and support teams. You may want to check the threads available there for additional assitance and support.
John M
Microsoft Windows Client Team
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