if your destop have a document folder and you cant delete it, and all the folder from C: have a .exe example:program files.exe windows.exe thats a vurus.
i have this virus on my pc but now i removed it. how?

step 1
download the malwarebytes here http://download.cnet.com/Malwarebytes-Anti-Malware/3000-8022_4-10804572.html
step 2
install it
step 3
scan your computer
step 4
after you scan,you can now install the antivirus, go to http://egydown.com to have a free antivirus,i recommended the avira or mcAfee
step 5
now you have it, your pc is now protected!