XP SP3 and ntdll.dll

[jsmileb]

Trying to install XP-SP3. I get a message that the file C:/Windows/system32/ntdll.dll is being used by another program and stops the install. Have closed all identities and programs, startup on the start menu is empty. Taskmanager shows no active programs. I cannot see anything in running processes that would be unusual. Any ideas as to how I can find what might be using this file?
XP-MCE
Service Pack 2 and all updates to date
Avast Antivirus (even tried turning that off)

 

[Matthew DeCarlo]

Try installing it in Safe Mode.

 

[jsmileb]

Muchas gracias, Zenosincks. Burned an ISO image and seems to be installing just fine. Have never failed to solve a problem using sources like Technet, thanks to participants like you. Thanks again!

 

[Matthew DeCarlo]

You're welcome, jsmileb.