One way to fix it might be to download Alcohol or Deamon tools or something like that ...
od download more RAM and more GHz?
Even better yet download Girlfriend and throw a party
just kidding, sory couldn't help it.
For what it's worth, i play on a clean install:
Gouty install of MWLL
Ultimate Windows Tweaker
on 4Gb of ram and swapfile disabled B)
i suspect a stray registry value here
steam? gamespy? 32bit punkbuster? from a long uninstalled game?