Try opening an elevated command prompt, go to a completely different folder (preferably drive) and type xcopy It should say something along the lines of: That is fine, since you aren't using the program correctly (but shows if it works). Don't just do it without changing the drive and path. If you run it straight away, you will already be in C:\Windows\System32 so it wouldn't help. I suspect a third party program has changed the default path settings, it can be changed back, but working out whether that is the problem first will help From the command line, after trying the above, type path This will show the path variable (if a program isn't found in the current location it looks for it in the path locations sequentially). The locations are separate by a semicolon ;. Even if third party stuff has added locations to the path variable, many actually put their location before C:\Windows\System32, which they really shouldn't. Like I said though, ideally the tool should be calling it directly as I mentioned in my last post, using Code: "%windir%\system32\xcopy.exe" and not just relying on the path variable.