Sure that it's not the laptop CPU heating up, and then going into thermal-throttling mode? Might want to download/install ThrottleWatch to check that. Either that, or ... are you using PunkBuster (an online gaming anti-cheating tool)? There are some reports of similar, regularly-repeatable "pauses", while playing games online that use Punkbuster; most often seen with XP and AMD64 systems with AGP video, although it has been seen in other combinations (although W2K appears to be immune from it). (I suspect some sort of wierd interaction between the AGP GART driver, and XP's lazy-allocation of PTEs, and PunkBuster tries to, at regular intervals, memory-map the entire game's process address space, to scan for "cheat" software's code-strings. Given the memory requirements of most games, this could easily result in a brief pause. However, 5-10 seconds seems a bit too long for that, I suspect thermal-throttling, or possibly a HD issue, those are also known to cause "freezes", but generally only when overheating, or when accessing the same sector, if it is going bad.