Hi ThanishaKadapa-8334,
This is normally caused by a faulty driver. There are a few options here:
Restore the ntdll.dll file
Update your Windows system
Run the Program Compatibility Troubleshooter
Disable the problematic add-ons of your Internet Explorer
Reinstall the problematic program
Run the DISM tool
Run the System File Checker
Replace the file ntdll.dll from a trustworthy source
Pro tip: Update your drivers
With a little more information about the issue, we may be able to narrow down the correct option.
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