LiberalPipe :
I have Norton antivirus installed, and I just noticed that when I try to do a scan nothing happens as well. When I right click the chrome installer .exe file and run it as administrator, it asks if I let it make changes on this computer and after I click yes nothing happens.
Do you know how to boot from a CD/DVD? If so, download and burn this using an ISO burning utility (such as ImgBurn):
http://www.avg.com/us-en/avg-rescue-cd
The AVG Rescue CD allows you to scan your system before Windows starts, that way any potential malware cannot start. It may not be malware that is causing your system to malfunction, but this is a good place to start.