Hello,
By default, the NI-VXI driver doesn't load particularly early in the boot process. If the NI-VXI driver was causing the blue-screens, the computer would more likely crash at the login screen, rather than during boot.
Of course, the drivers installed in your PC will be loaded at different moments depending on the version of Windows that you are using. However, as you mentioned above, your system used to work fine for half a year now, so most probably the blue-screens are caused by corrupted files in your computer, not necessarily files from the NI-VXI driver.
A first step to troubleshoot the system would be to uninstall the NI-VXI driver from the "Add/Remove Programs" (go to the START button>>Settings>>Control Panel>>Add/Remove Programs), turn OFF your PC
and remove the PCI-MXI-2 card. At this moment, you can turn ON your PC. If the blue-screens do not occur again, re-install the NI-VXI driver and then install the PCI-MXI-2 board. You can download NI-VXI 3.2 from our website (http://www.ni.com/support/vxi/drivers.htm). If there was a file corrupted, this will fix it.
If the blue-screens still appear, then there must be other corrupted files in your system. In this case, you should consider backing-up the information in your PC and re-installing the Operating System.
Hope this helps,
Claudia Lorente
Applications Engineer
National Instruments