Boot into Safe Mode using Automatic Repair if possible, otherwise use a Windows 10 installation USB. 2. Run Startup Repair from the recovery environment to fix boot issues. 3. Rebuild the BCD using bootrec commands in Command Prompt, handling access denied errors by renaming the BCD file. 4. Repair system files by running DISM and SFC commands to restore system image and registry integrity. 5. Use System Restore to revert recent changes like updates, drivers, or hardware installations. 6. Run chkdsk C: /f /r to check and repair disk errors. 7. As a last resort, reset Windows while keeping files to reinstall the OS without data loss. The "Bad System Config Info" BSOD is typically caused by corrupted system configuration data and can be resolved using these recovery steps in sequence, preserving data whenever possible.

The "Bad System Config Info" Blue Screen of Death (BSOD) in Windows 10 usually points to corrupted system configuration data—often related to the registry, boot files, or hardware changes. It can occur after a failed update, driver installation, or improper shutdown. The good news is that it’s often fixable without losing your data. Here’s how to troubleshoot and resolve it.

1. Boot into Safe Mode (If Possible)

Before attempting fixes, try to get into Safe Mode to limit background processes and access recovery tools.

• Restart your PC and interrupt the boot process 3 times to trigger Automatic Repair.
• Go to Troubleshoot > Advanced Options > Startup Settings > Restart.
• Press F4 or 5 to enable Safe Mode or Safe Mode with Networking.

?? If you can’t boot into Safe Mode, skip to step 2 using a Windows 10 installation USB.

2. Run Startup Repair

Startup Repair can automatically fix common boot configuration issues.

• Use a Windows 10 installation USB or recovery drive.
• Boot from it and select Repair your computer.
• Navigate to Troubleshoot > Advanced Options > Startup Repair.
• Let it run (may take several minutes and restart the system).

? This often resolves BCD (Boot Configuration Data) issues causing the error.

3. Rebuild BCD (Boot Configuration Data)

If Startup Repair doesn’t work, manually rebuild the BCD using Command Prompt.

From the recovery environment:

1. Open Command Prompt via Troubleshoot > Advanced Options > Command Prompt.
2. Run these commands one by one:

bootrec /scanos
bootrec /fixmbr
bootrec /fixboot
bootrec /rebuildbcd

? If rebuildbcd finds a Windows installation, type Y to add it.

If you get "Access denied" on fixboot, try:

bcdedit /export C:\BCD_Backup
attrib c:\boot\bcd -h -r -s
ren c:\boot\bcd bcd.old
bootrec /rebuildbcd

4. Check for Corrupted System Files

Run DISM and SFC to repair system image and registry-related files.

In Command Prompt (from recovery environment):

DISM /Image:C:\ /Cleanup-Image /RestoreHealth

Replace C: with your actual Windows drive letter if different (check using dir C:\Windows).

Then run:

sfc /scannow /offbootdir=C:\ /offwindir=C:\Windows

These commands repair the Windows image and verify system integrity, including critical registry components.

5. Undo Recent Changes (Driver, Update, or Hardware)

This error often follows:

• A recent Windows update
• New driver installation
• Adding/removing hardware (especially storage)

If you suspect one:

• Use System Restore from recovery:
  • Go to Troubleshoot > Advanced Options > System Restore.
  • Choose a restore point from before the issue started.

? This is often the fastest fix if a restore point exists.

6. Check Disk for Errors

Hardware or disk corruption can trigger this error.

In Command Prompt:

chkdsk C: /f /r

This scans and repairs bad sectors and file system errors. It may take a while if the drive is large.

7. Reset Windows (Last Resort)

If nothing works, consider resetting Windows while keeping your files.

From recovery:

• Troubleshoot > Reset this PC > Keep my files
• This reinstalls Windows but preserves personal data.

?? Back up data first if possible (use another PC and remove the drive if needed).

Summary of Key Fixes

• ? Run Startup Repair
• ? Rebuild BCD using bootrec commands
• ? Use DISM & SFC to fix system corruption
• ? Try System Restore
• ? Run chkdsk to rule out disk issues
• ? Reset Windows if all else fails

Most cases of "Bad System Config Info" stem from corrupted boot or registry data—fixable using the built-in recovery tools. The key is acting methodically and avoiding unnecessary reinstallations. Basically, start with Startup Repair and work your way down the list.

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