Like I said bootrec commands has error of saying "'Bootrec' is not recognized as an internal or external command,
operable program or batch file." which is why I posted a question here on the first place.
Both step 6 and 7 work but step 8 keeps telling me that The process cannot access the file because it is being used by another process.
first alternative link you posted shows about exporting bcd which was on step 6 which I already done so that doesnt help because my problem now is step 8 which is renaming before doing the bootrec /rebuildbcd and the other alternative you posted involves clean install like I said I'm not going to do.