Most of the ntdll.dll errors result from a corrupted ntdll.dll file or from the corrupted hardware drivers.

Below is a list of Ntdll.dll errors:

- “STOP: 0xC0000221 unknown hard error C:\Winnt\System32\Ntdll.dll”
- “STOP: C0000221 unknown hard error \SystemRoot\System32\ntdll.dll”
- “AppName: [PROGRAM NAME] ModName: ntdll.dll”
- “[PROGRAM NAME] caused a fault in module NTDLL.DLL at [ANY ADDRESS]”
- “Crash caused in ntdll.dll!”
- “NTDLL.DLL Error!”
- “Unhandled exception at [ANY ADDRESS] (NTDLL.DLL)”

So, how do we fix Ntdll.dll ?

Make sure you have the latest version of windows service pack which is SP3 for Windows XP. If ntdll.dll error only occur in certain software only, try reinstalled that particular software. Otherwise, make sure the software installed is compatible with your current running windows version or compatible with your windows service pack. If the software program has any updates or service packs available, install them too. Otherwise, notify the author to look for solution or patches that causes Ntdll.dll error.

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