Hrm….I doubt the drivers are actually getting removed, but it would seem as if the board is being “disabled” in the device manager.
If this happens regularly it would suggest a couple of things. One that there is some sort of system issue, which might cause the board to become unrecognized. I would update the motherboard BIOS (from the mobo manufacturer) and Motherboard Chipset drivers (from the chipset manufacturer, e.g. Intel, AMD, nVidia) as well as the peripherals (for graphics card, sound board and HBA).
See if that helps stabilize the system. If it is still a problem you could be dealing with a flakey board, but I am not completely convinced of that, as if the board were the problem it probably wouldn’t work while the drivers were showing up.
So give that stuff a check and if that doesn’t do it, please let us know.
Sincerely,
Joshua
Director of Support
Blackmagic Design Inc.