FIX FOR SEVERE LAG

So I just ran another test. No mods, no packages, all cc deactivated via launcher, total new vanilla game in Sunset Valley and lag type 2 appeared right away. It wasn't severe (as expected) but the clock was frozen some minutes, stepped forward and was frozen again. Gobias Koffi was standing at the sidewalk and about to get in his car. That took about 10 minutes. Then at the community lot the clock was frozen for about half an hour, stepped forward and was frozen again. It took a while again from stopping at the target until Gobias appeared on the sidewalk. I can't tell how long because the clock was still frozen. While Gobias was about to enter a door he got stuck in the middle of the walking animation for several sim minutes, walked through and was stuck again. It's always the same!
Oh and my PC meets the specs. Windows 7 Ultimate 64 bit, 8GB RAM, the virtual RAM settings are 1.5xRAM - 3xRAM. Intel I5 CPU and a Radeon HD6800 graphics card.