The problem still pursists here, and it seems to almost be worsening. I cleaned up my PC, i uninstalled the Halo trial, and tried a WWII flight simulator (IL2) that always worked perfectly fine before, and it still does the skipping thing.
But here's wierded, anyone played that "falling sand" game, it even skips on a game that simple. It does on an emulator too, for SNES i tried running Super Mario World (i own the actually copy, i just did this to test) and it not only skips, but the frame rate plumits too...
I don't know what to do, i've cleared my PC of hundreds of old files, uninstalled dozens of unused things, a Defrag, and cleanup has been run, as well as spyware and virus checks.
Someone out there has to know what to do, i'd ask microsoft directly but the jerks charge money for help (go figure...)