Seems the times when Macs were allways running more stable than PCs are over
You know it maybe wise to actually clone the MBP on a external firewire using Super duper or carbon copy. Than boot from that on your desktop and zero out you main hard drive on the desktop and than clone the MPB clone over to the desktop. That should clear it up in a heart beat if the MBP is fine. I do this a lot. But before you do that clone your existing hard drive on another partition in case all goes wrong. Which is very rare.
To me this actually sounds more like a Mac OS issue than anything else on your desktop