I played the game for 100 + hours without problem, then this problem appears.
Skyrim freezes then resumes then freezes every 5 seconds after playing for a few minutes.
I tried re-installing the game, lowering the graphics to low, removing all mods.
This is also not a savegame issue, it happens even in a new game.
Also tried running in windowed mode, did not fix the issue.
I also tried using game booster(to see if a background is causing this).
I also tried running the game in my Windows XP partition, got the same problem.
I do have the latest drivers
One thing I have noticed is my CPU load goes from around 90% to 30% during the freezing.
Any help is appreciated.