convert entries in PATH to 8.3 format to gain more character space

shortpath.bat

REM http://stackoverflow.com/questions/4405091/how-avoid-over-populate-path-environment-variable-in-windows

@echo off

SET shortpath=%PATH%
echo "Old PATH documented in C:\_admin\OLDPath.txt"
echo %shortpath%
echo %shortpath% > C:\_admin\OLDPath.txt
echo --
echo "Directories not found, documented in C:\_admin\PATH_folders_not_found.txt"
echo --

setlocal EnableDelayedExpansion

SET TempPath="%shortpath:;=";"%"
SET var=
FOR %%a IN (%TempPath%) DO (
    IF exist %%~sa (
        SET "var=!var!;%%~sa
    ) ELSE (
        echo %%a does not exist >> C:\_admin\PATH_folders_not_found.txt
    )
)

echo --
echo "Shortened PATH documented in C:\_admin\NEWPath.txt"
echo --
echo !var:~1!
echo !var:~1! > C:\_admin\NEWPath.txt
echo --
echo "Open C:\_admin\NEWPath.txt, Open regedit, Navigate to HKLM\System\CurrentControlSet\Control\Session Manager\Enviroment, Dobule click on Path, copy in contents of C:\_admin\NEWPath.txt, Click OK, reboot PC, Validate change."