SO I decided to purchase the game while I was on holiday and installed it on my laptop I had with me. I purchased the game via Steam incase that is important.
Now that I am back from vacation I want to install the game on my Desktop and have done that, but when I try to log into my myplayer account it says the account does not exist, but when I try to make a new one it won't let me use my CD key as that has already been used. Do I need to uninstall from my laptop first?