[eggman]

The rare Unix system crash was usually issued as something like
PANIC! Memory fault. Core dumped.
at the system console.

Thankfully, Microsoft never gave their users error messages starting with PANIC! But my favorite Microsoft error message was
Not enough memory to

That was it. Nothing else. System froze.

[zeugma]

But my favorite Microsoft error message was
Not enough memory to

That was it. Nothing else. System froze.

My favorite microsoft error message was a pretty common one.

"File exists, or file not found"

OK. so. the computer is basically trying to tell you that the file either exists or doesn't. Really useful.

[cynwoody]

The rare Unix system crash was usually issued as something like
PANIC! Memory fault. Core dumped.
at the system console.

Linus's original code: http://lxr.linux.no/linux+v3.6.6/kernel/panic.c

It took printf-style arguments.