Computer problems: A couple of obnoxious brats!

Yesterday was not a good day for my netbook. As soon as I would log in to use my computer I found I only had a minute or two before it would automatically restart. I was able to keep my computer on long enough to learn that Microsoft Security Essentials was detecting a couple of obnoxious brats. The following are showing up on my netbook: Virus: Win32/sirefef.R Trojan: Win32/sirefef.AH I tried to use Microsoft Security Essentials to disinfect and remove these guys but my netbook would restart before I could accomplish anything. I used a search engine to find information on how to manually remove them; however, even in safe mode, my computer would restart before I could delete certain files or remove registry entries. I have another laptop I can use, which is what I'm using now, but I'd like to "clean up" my netbook because it's less than a year old. Are there any computer nerds/geniuses or brilliant computer people that can offer suggestions? Thank you!