From: Matt Carter on
BAD_POOL_HEADER
STOP: 0X00000019 (0X00000020, 0XE16FE7A0, 0XE16FE7C0, 0X0C040604)

I went to repair a botched XP SP2 install, using Microsoft Licensing CD's
for my company, never asked to put in a CD Key, but all legal. Went in, did
an Install and then selected to Repair. Initially did a Repair and chkdsk /p
/r for a checkdisk for bad sectors and mark them as such.
When went to Install and reinstall a "repaired" XP SP2, I got the error above.