Help with a Windows Drive booted under VBOX on F14

[JD]

Dear all,
I have a windows XP-Pro drive that was booting just fine
on real hardware.

However, While I was running Fedora 14 on a laptop,
on which VBox is installed, I took out the windows drive
from the other machine and connected it to the laptop
via a USB external box.

It booted just fin under VBox.

But now, it will not boot by itself on the real HW machine (a desktop) any
longer.

What happens is I see the screen switch to graphics mode, then
very very fast, some message comes out,  way too fast for me to
read, and the machine then reboots.

Would appreciate some help to get to the bottom of this.

Thanx,

JD
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