I have been running Win2k on an Asus A7V with out any difficulity with Bios 1004c. I have run 2 different installs of win2k. The first I upgraded the BIOS after Win2k was installed, no problems with stability. The second install of win2k was done after 1004c was install. Again I have experienced no problems with Win2k. I think you need to look else where for your problems. If i had to guess, I would say that you have a corrupted OS. THe best bet would be to reinstall win2k, if you still have problems (assuming that your bios settings are proper) I would look at examining your MB to be sure that there is not any flaws in it.