Scroll down to the bottom of this page (all about STOP messages with
hyperlinks to resources):
http://aumha.org/win5/kbestop.php
<quote>
0xC0000221: STATUS_IMAGE_CHECKSUM_MISMATCH
(Click to consult the online Win XP Resource Kit article, or see Windows
2000 Professional Resource Kit, p. 1563.)
Indicates driver problems, system file problems, disk corruption problems
(such as a damaged pagefile), or faulty memory hardware.
General Discussion {KB 101096} Win NT, Win 2000, Win XP
Unable to Load Device Driver {KB 160495} Win NT, Win 2000, Win XP
"STOP: C0000221 Unknown Hard Error" or "STOP: C0000221
STATUS_IMAGE_CHECKSUM_MISMATCH" Error Message Occurs {KB 314474} Win XP
</quote>
HTH
"ScorpS" <> wrote in message
news:97B93352-8106-4DD7-B44C-...
>I just recently purchased a new Maxtor 300GB HD & I formatted & installed
>XP
> pro. It worked fine until I installed SP2. After I rebooted, I got this
> error
> message: STOP: c0000221 unknown hard error \system
> root\system32\ntdll.dll.
> Can anyone help me figure this one out?? I go into safe mode & uninstall
> SP2
> & reboot then it works fine. It's only after SP2 is installed that I get
> this
> message. I also installed an ATI Radeon 9550 Xtasy video card & a new
> monitor
> at the same time as the hd, but this error only comes up after installing
> SP2. Thanx for any help.
>