From Command Prompt (recovery environment):
From Command Prompt:
diskpart list volume exit Look for the volume labeled or System Reserved . Often the OS drive is D: in recovery mode (because the recovery environment uses C: for itself). Note the drive letter (e.g., D:). Step 4.3 – Rebuild Boot Configuration Data (BCD) This fixes 80% of boot errors: windows server 2012 r2 boot repair
~30% – but when it works, you're done in 5 minutes. and driver issues
Startup Repair scans for missing/corrupt boot files, registry damage, and driver issues, then attempts auto-fix. windows server 2012 r2 boot repair
bootsect /nt60 sys /mbr Then retry /fixboot . If /rebuildbcd doesn't find any OS, rename the old BCD and create a new one:
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