I think this WIDTH80.COM must be for some (SVI?) MSX1 setup using external 80-column display adapter or SVI-738's V9938.
(Don't remember seeing those programs though)
Now that we have perfectly good & correct answer to your question (thanks to msxholder) I would like to ask, how we can help you?
In order to do that we need to know at least:
a) What you are trying to archive? (please note also AxelF comment)
b) What hardware do you have / are you an emulator user?
Thank you very much!. Investigating with your help I have found the file 738msxdos.dsk wich contains the CHANGE.COM
Actually, it is for a partner of mine, not sure what he is trying to do. I will pass the file to him and ask him the results.
I'll let you know.
Best regards,