foo and bar are just variable names created by someone with a sense of humour. They are thought to originate from the military slang FUBAR (F'd Up Beyond All Recognition) :) https://en.wikipedia.org/wiki/Foobar
A problem has been detected and Windows has been shut down to prevent damage
to your computer.
The problem seems to be caused by the following file: xNtKrnl.exe
If this is the first time you've seen this stop error screen,
restart your computer. If this screen appears again, follow
Check to make sure any new hardware or software is properly installed.
If this is a new installation, ask your hardware or software manufacturer
for any Windows updates you might need.
If problems continue, disable or remove any newly installed hardware
or software. Disable BIOS memory options such as caching or shadowing.
If you need to use safe mode to remove or disable components, restart
your computer, press F8 to select Advanced Startup Options, and then
select Safe Mode.
*** STOP: 0x1000007e (0xffffffffc0000005, 0xfffff80002e55151, 0xfffff880009a99d8,
*** xNtKrnl.exe - Address 0xfffff80002e55151 base at 0xfffff80002e0d000 Dat