: Scans all disks for Windows installations that are not currently in the BCD. bootrec /rebuildbcd : Rebuilds the Boot Configuration Data (BCD) file. Microsoft Community Hub 3. Advanced BCD Rebuild bootrec /rebuildbcd
If the boot records are fine but the server still won't start, underlying system files or disk errors might be the cause. Check Disk chkdsk c: /f /r verify disk integrity and repair bad sectors. System File Checker sfc /scannow /offbootdir=c:\ /offwindir=c:\windows repair corrupted system files from an offline environment. Phase 5: Safe Mode and Driver Issues windows server 2012 r2 boot repair