I went from Iwill KK266a to A7n8x dlx and instead of formatting I just repaired the winXP install. I also changed vid cards from nvidia to ati and the processor from t-bird to barton and the memory from pc133 to pc3200. All my programs worked and I had to install the nforce drivers to get lan and sound. Of course I can only get sound from my analog headphones and not my digital speakers (but thats a different story) The system doesnt seem to run as smooth as it should so I think I know the answer but I would like some input. Should I go back and reformat the HD and then reinstall the drivers?