awk

@echo off
for /f "tokens=1,2 delims=:" %%i in ('reg query "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders" ^| find /i "Appdata"') do (
    set "strA=%%i"
    set "strB=%%j"
)
set "PA=%strA:~-1%:%strB%"
echo %PA%
pause
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