Thanks for letting the resolution be known!
For future reference, to restore the operating system use Phoenix Firstware. Phoenix Firstware uses a small, protected area of your hard drive to store an image of the OS provided to you at the time of shipment. Should you need to restore your system OS to its original condition, you may access that image by pressing and holding the <F4> key (on the PXI-8186, PXI-8187, PXI-8195, or PXI-8196) when video first appears during the boot process.
For more information on Phoenix Firstware, please check out the following Developer's Zone Document:
Restoring or Changing the Operating System in a PXI-8180 or PXI-8190 Series Embedded Controller
Good luck in the future!