I reinstalled Skyrim after a 1 month break, but now when I log in to the game there is intense lag as if the game is playing on ultra high settings. I logged out many times to check that all settings were set to low, that my graphics cards were up to date and that there weren't background programs running to no avail.

System:
HP
Intel Core 2 Quad CPU Q9400 @2.66GHz 2.67GHz
Memory: 4.00 GB
System type: 64-bit

Display Adaptors
Nvidia GeForce 9800 S
nForce 760i SLI