Unable to Delete .PDO File

I have an old .PDO on my desktop I want delete, but I need the source file or disk and I do not have either. Is there any way I can possibly delete the file without them?

Cannot access PDO files on windows?
When windows gives you an error message saying that it
"Cannot open PDO files", this means either:

A. You need to identify a program that can open the file
B. Or your registry may be damaged


RECOMMENDED:
In both cases it is strongly recommended that you
run a free scan for registry errors.

or

Try running a app called unlocker (Free)
http://download.cnet.com/Unlocker/3000-2248_4-10493998.html

or

Boot into safe mode and try to delete the file!