set LastKey="HKEY_CURRENT_USER\Software\SimonTatham\PuTTY"
set Key=HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Regedit
reg add %Key% /f /v "LastKey" /d %LastKey%

start regedit.exe

@echo off
prompt -$G

for /f "tokens=1,2*" %%a in ('date /t') do set date=%%a

echo on

reg export HKEY_CURRENT_USER\Software\SimonTatham\PuTTY "PuTTY settings Backup %date%.reg"

@echo.
@pause