I am getting the boot error

STOP: c0000221 Unknown Hard Error\systemRoot\System32\ntdll.dll

does anyone have or know where I can get a fix for this error.

I'm getting the same error trying to install XP on a clean drive. Were you able to find a solution?

How to repair a Windows XP system that shows the following error:
Stop: c0000221 Unknown Hard Error \SystemRoot\System32\ntdll.dll

1: Boot from the Windows XP installation CD allowing the setup process to initialize.

2: Chose B when the setup process asks:
a) Install a new version of Windows XP
b) Repair a previously installed version using the Emergency Repair Disk Method

3: Chose A when the setup process asks:
a) Repair using the Recovery Console
b) Repair using the Emergency Repair Disk Method

4: At the DOS prompt type chkdsk /r and press enter

5: Once the lengthy repair process is over you will still be at the DOS prompt, reboot the pc.

6: Reboot from the Windows XP installation CD allowing the setup process to initialize.

7: Chose A when the setup process asks:
a) Install a new version of Windows XP
b) Repair a previously installed version using the Emergency Repair Method

8: The installation program should then detect your previously installed Win XP OS and....

9: Chose B when the setup process asks:
a) Install another copy of Windows XP
b) Repair the previously installed version

10: After the repair process remove the installation disk during reboot. The computer most likely will boot into a setup as if being installed for the 1st time.

11: During the setup process the computer may fault on a sys file. If is does reboot the computer and it again should boot into a "1st time" setup process but this time it should complete the process.
without any problems.

If this doesn't cure the problem, I'd suggest a clean install on a freshly formatted hard drive. :)