Is Outlook fully closed, and not a running Process?

"HankL" wrote in message
...
Whenever I attempt to copy outlook.pst (Outlook 2003) I get the following
error message:

Error 0X800070021

The process cannot access the file because another process has locked a
portion of the file.

Is there anyway I can unlock this file as I do need to copy it elsewhere?

Thanks in advance for your support and suggestions?

HankL