When I try to port forward, I am led through several steps. One is to go to Run and type in Command. When I do that, I can see the DOS prompt, but there is an error and it doesn't matter which option I choose, the program closes.
Error:
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C:\WINDOWS\system32\command.com
C:\WINDOWS\SYSTEM32\AUTOEXEC.NT. The system file is not suitable for running MS-DOS and Microsoft Windows applications. Choose 'Close' to terminate the application.
CLOSE IGNORE
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(A) How do I fix that?
(B) Is there another way to get my IP, subnet, etc. numbers from my computer or an alternate way of getting to the prompt?

Thanks for all of the help so far, folks!