stop c0000221 unknown hard error - server 2003 urgent

after windows updates on a server 2003 box i get:

stop c0000221 unknown hard error
/systemroot/system32/ntdll.dll



safe mode it so far is stuck on acpitabl.dat

the array says functional.


help.

it cannot boot.

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jeremycushingAsked:
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jeremycushingConnect With a Mentor Author Commented:
I ended up replacing ntdll.dll from an image and it fixed it.  

Great tip about the ms updates!

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ZombieAutopsyCommented:
you could use the recovery console to try and replace the corrupt file. Or Run a repair on your current installation.
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jeremycushingAuthor Commented:
renamed the update.sys and then copied from cd - rebooted. same issue.
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jeremycushingAuthor Commented:
anyone anyone anyone?
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lscarborCommented:
Try turning off hyperthreading (especially if it's an HP box)
Try 'Last Known Good'
Microsoft gives free support with network down issues related to updates.
Look at this:
http://support.microsoft.com/default.aspx?scid=kb;en-us;156669
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lscarborCommented:
Great! Glad it's working.
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jeremycushingAuthor Commented:
l
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jeremycushingAuthor Commented:
this is what the fix was
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