Creating Auto Backup using Unirar in dd-mm-yyyy.rar format
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create a batch file and save it to anyname.bat

@echo off
c:\progra~1\winrar\rar.exe a "c:\%date:~0,2%-%date:~3,2%-%date:~6,4%.rar" c:\temp\*.*
pause

run the batch file in schedule time from task and schedule