I have recently upgraded my desktop system from a K6-2 550 to a K6-2+ 533. The mobo is an Atrend ATC-5200, running at 5.5 x 95 MHz (523MHz) and 2.0v core. I use 2 OSs with separate removable HDDs. With Win ME, the system works superbly, with a noticable improvement, and no errors. With Win 98, I get frequent messages on boot up, announcing that there has been a problem accessing the registry, requiring a restart to fix it. I have tried a clean install of '98 on another HDD, but the same error came up, nearly straight away. Any ideas ???