'ping' is not recognized as an internal or external command path variable seems ok

Today I started getting this error when trying to run any command from the command prompt:
'ping' is not recognized as an internal or external command. I immediately went to have a look at my Path Variable but this also seemed to be okay. 

It included the %systemroot%\system32 so I closed these windows and rebooted the pc just to be sure, but I still got the same error. So I opened the Path variable again an now chose to "Edit text" and added an extra ; at the back and the submitted the changes by clicking OK

This extra ; normally isn't needed, because it even get's removed if you close the form, but for me it was enough to fix the problem after closing and opening my command prompt again.