I took a perfectly good system running Windows95, Labview4.0, and NI-DAQ4.9 on a Pentium-based computer with an AT-MIO-16DE-10 DAQ board and tried to install Labview5.1 and NI-DAQ6.5. Now the computer does not recognize the existence of the DAQ board despite the fact it is supposed to be Plug-n-Play. I have tried uninstalling, installing Lv5.1 with NI-DAQ6.1, Lv5.1 with NI-DAQ4.9, and even reinstalling Lv4.0 with NI-DAQ4.9, but the computer just doesn't see the board. The driver for the AT-MIO-16DE-10 doesn't appear with NI-DAQ 6.5 or 6.1 so I understand that it is likely that these versions don't support this board anymore, but it does appear in 4.9 and that still doesn't explain why I can't even return to my original configuration. Any idea what happened here and how to fix it? My email is email@example.com. Thanks.