Restart your computer in Safe Mode WITH Networking. To do this restart your computer and immediately start tapping the F8 key. This function is somewhat system specific so yours maybe F2, F10, or F12, something like that. Now choose to start in safe mode with networking. Now you need to download and install Malwarebytes Anti Malware. Run a complete scan.
Next download and install SuperAntiSpyware and scan your system. I should mention that if the virus is blocking installation of Malwarebytes or SuperAntiSpyware you need to change the .exe file name to something else. (just right click the .exe file you just downloaded and select rename. Also make sure NOT to include .exe when renaming.
MALWAREBYTES ANTI MALWARE-
http://download.cnet.com/Malwarebytes-Anti-Malware/3000-8022_4-10804572.html
SUPERANTISPYWARE-
http://download.cnet.com/SuperAntiSpyware-Free-Edition/3000-8022_4-10523889.html
Once your computer is cleaned and free from any malware/spyware I recommend downloading and installing any of the below FREE Anti Virus solutions.
MICROSOFT SECURITY ESSENTIALS-
http://www.microsoft.com/security/products/mse.aspx
AVG-
http://download.cnet.com/AVG-Anti-Virus-Free-Edition-2011/3000-2239_4-10320142.html
AVAST
http://download.cnet.com/Avast-Free-Antivirus/3000-2239_4-10019223.html