[Blind-sysadmins] 7 recovery tools accessible

Hello, I'm trying to fix a win7 pro machine that keeps entering a boot loop. The 7 startup repair comes up, tries to repair then says it can't fix. I've tried googling this and have come up with two commands which might work: bootrec /fixmbr bootrec /fixboot I'm wondering if this is something that can be made to talk perhaps via a PE? I'd appreciate any other suggestions to fix this. I'd rather not have to reinstall. Thanks. Dave.