Had to remove all but one of them.
Strangely, though, it's now installing happily with all my hardware connected :|
2GB tbh!
:((
If anyone's arround and want's to have a try feel free. I'm still installing Windows Updates so will be restarting in about 10-20 minutes, but everything else is good to go I think.
First impressions from my Laptop are looking promising.
All looking good now. Going to finish installing Windows Updates and then it's good to go.
According to Jon it's running as fast as singleplayer :D