xcopy command in ms-dos does not work

anmor January 15, 2011 at 16:09:27

That's because there is no dos in Vista. It has a command prompt but the old dos commands don't work as they did. Type help at the command prompt for a list of valid commands.

I have been using a backup program I wrote and it worked fine until about a month ago. The "HELP" command is also not valid. Something has changed, but I am not sure what. The "COPY command will work, but not "XCOPY".

anmor January 16, 2011 at 11:35:04

It appears the XCOPY still works in Vista so you have an unknown problem. For a list of commands that HELP would have supplied follow the link below. http://commandwindows.com/vista-com...