If you are currently experiencing a boot loop, missing files, or disk errors, let me know:
If none of the above repair commands successfully bring your Windows Server 2012 R2 back to life, the underlying damage to the operating system or active directory database might be too severe. In this scenario, your best course of action is to:
To help isolate the issue if the server still fails to boot, please let me know:
diskpart select vdisk file="D:\VHDs\Server2012R2.vhdx" attach vdisk readonly list volume exit bootrec /fixboot bootrec /rebuildbcd windows server 2012 r2 boot repair
Whether the server is a or a virtual machine (e.g., VMware, Hyper-V). If you have a System State or Bare Metal Backup available.
Identify the drive letter for your Windows installation (it may be in recovery). dism /image:D:\ /cleanup-image /revertpendingactions To remove a specific problematic package, use: dism /image:D:\ /get-packages followed by dism /image:D:\ /remove-package /packagename:[PackageName] 5. System File and Disk Integrity
D. File system repairs and data recovery If you are currently experiencing a boot loop,
Once inside WinRE, navigate to . This is the easiest first step. The tool automatically scans for common startup issues like missing or damaged boot files and attempts to fix them without any user intervention. If this solves the problem, you're done. If not, proceed to the next chapter.
Once in Command Prompt, run:
: The System File Checker (SFC) scans and repairs corrupt or missing system files. Run the command: sfc /scannow /offbootdir=C:\ /offwindir=C:\Windows . Identify the drive letter for your Windows installation
If the server begins to boot but crashes (e.g., during classpnp.sys or disk.sys loading), a third-party driver or service is likely the culprit.
Document your server’s partition structures (MBR vs. GPT) and keep a dedicated Windows Server 2012 R2 ISO/USB on hand.
Startup Repair is a built-in automated tool that scans for common boot problems.
chkdsk C: /f /r