pfp writes "Myria at pagetable.com, among others, noticed that Skype reads the machine's BIOS code on startup. This probably would've gone unnoticed if the operation didn't fail on 64-bit windows. From the post: 'It's dumping your system BIOS, which usually includes your motherboard's serial number, and pipes it to the Skype application. I have no idea what they're using it for, or whether they send anything to their servers, but I bet whatever they're doing is no good given their track record... If they hadn't been ignorant of Win64's lack of NTVDM, nobody would've noticed this happening.'"