Extreme lag

[Thomas]

Seems like a cpu issue then since enemies do take up a bit of cpu.

You should have a powerful enough cpu though and I am not sure what could be wrong. The only thing I can think of (and that I have already suggested) is that some other app is taking up alot of your cpu. Make sure to turn off msn, skype, etc. Anti virus programs or stuff like that might also be the problem.