HOW TO FIX BOOTMGR MIXING ON STARTUP( INCLUDES OTHER FILES MISSING,NOT FOUND AND CORRUPTED ERRORS etc.)?

This can be solved in five steps:
1.Insert Windows set up disk and change boot device priority to dvd/cd drive
2.After loading windows set up disk click on repair
3.Click on start up repair and it will fix automatically OR
4.Click on command prompt and type bootrec/bootfix
5.If above methods don,t work then install new windows.

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