haha...yea...fix your path.
Right click My Computer
go to properties
go to advanced
click environment variables
in the system variables section (bottom) find PATH and open it
you may want to copy the contents and put them in notepad so you can read it
if it's empty, nevermind that last step
you should have the following entries in there somewhere...every entry is separated by a semi-colon (;)
%SystemRoot%\system32
%SystemRoot%
If that doesn't work, try manually specifying the system root, ie
c:\Windows\system32
c:\windows
That should fix you.