Do you really want to clean the computer?
Then follow the steps given by PhilliePhan which INCLUDES, along with other steps, Malwarebytes' Anti-Malware.
Do you really want it clean or not?
The steps you read from Spyware-Experts cannot be trusted, the website itself has a poor reputation.
Do you honestly think that the steps given were posted just for the sake of posting something? We have steps we request because THOSE are the ones that work to begin cleaning a computer.