5 Easy Ways to Fix Bad System Config Info Error on Windows 10/11

The BAD_SYSTEM_CONFIG_INFO BSOD will prevent you from booting into Windows. It usually indicates a corrupted registry or bad boot configuration (BCD). In most cases, a PC restart will solve it.

However, if the PC restart won’t work or the issue occurs frequently, you can try the following solutions.

Fix 1. Repair Windows System Files

Step 1: Restart the PC, and the Automatic Repair will be performed. Once it fails, click Advanced options to access the Windows recovery tools in WinRE.

Step 2: Select Command Prompt and then use DiskPart commands to check if the boot drive still has the drive letter C.

1. diskpart
2. list volume
3. exit

Step 3: In my case, the boot drive’s letter has been changed to D:. Therefore, execute the “sfc /scannow /offbootdir=d:\ /offwindir=d:\windows” command to repair Windows system files.

If you encounter issues when running the SFC Scannow command, read the SFC Scannow usage guide to find solutions.

Fix 2. Rebuild the BCD File

Step 1: Open Command Prompt in WinRE and then execute the following command lines one by one to assign a drive letter to the EFI partition.

• diskpart
• list volume
• select volume * (* is the volume number of the EFI system partition. It is usually a small, hidden FAT32 partition)
• assign letter=# (select a drive letter different from existing ones)
• exit

Step 2: Rebuild the BCD file with the following commands.

• cd /d #:\EFI\Microsoft\Boot
• ren BCD BCD.bak
• bcdboot C:\Windows /s #: /f ALL
• bootrec /rebuildbcd

Fix 3. Remove Limits on CPU Core Number and Memory

If you have manually configured system limits on the number of available CPU cores and memory, removing them can solve the Bad System Config Info BSOD.

To do that, open Command Prompt in WinRE and then execute the following 2 commands.

• bcdedit /deletevalue {default} numproc
• bcdedit /deletevalue {default} truncatememory

Fix 4. Replace Damaged Windows Config Files

As the Bad System Config Info implies, the files in C:\Windows\System32\config are damaged. Fortunately, there was a backup of the folder (called C:\Windows\System32\config\RegBack).

You can open Command Prompt in WinRE and then use the following commands to replace bad important config files with backup.

• cd C:\Windows\System32\config
• ren C:\Windows\System32\config\DEFAULT DEFAULT.old
• ren C:\Windows\System32\config\SAM SAM.old
• ren C:\Windows\System32\config\SECURITY SECURITY.old
• ren C:\Windows\System32\config\SOFTWARE SOFTWARE.old
• ren C:\Windows\System32\config\SYSTEM SYSTEM.old
• copy C:\Windows\System32\config\RegBack\DEFAULT C:\Windows\System32\config
• copy C:\Windows\System32\config\RegBack\SAM C:\Windows\System32\config
• copy C:\Windows\System32\config\RegBack\SECURITY C:\Windows\System32\config
• copy C:\Windows\System32\config\RegBack\SYSTEM C:\Windows\System32\config
• copy C:\Windows\System32\config\RegBack\SOFTWARE C:\Windows\System32\config

Fix 5. Perform System Restore, PC Reset, or Reinstallation

If the above methods don’t work, you can try performing a system restore, PC reset, or reinstallation. The first option allows you to retain personal files such as photos, documents, and videos, while the last two methods may involve formatting the disk and deleting all data.

If your computer contains important data, you can restore it using MiniTool Partition Wizard first, and then reset or reinstall the computer.

MiniTool Partition Wizard DemoClick to Download100%Clean & Safe

Here is how to recover data from an unbootable PC.

Step 1: Make a bootable disk of MiniTool Partition Wizard.

1. On a well-running PC, connect a USB drive.
2. Launch MiniTool Partition Wizard and click Bootable Media on the toolbar.
3. Click WinPE-based media with MiniTool plug-in.
4. Select the USB Flash Drive as the destination.

Step 2: Boot the Bad System Config Info BSOD computer from the USB.

1. Insert the USB drive into the Bad System Config Info BSOD computer.
2. Power on the PC and press the boot menu key (F12, F11, Esc, or F2).
3. Select the USB drive from the menu.

Step 3: Scan the drive for data recovery.

1. Once the PC boots up, wait for MiniTool Partition Wizard to open automatically.
2. Click Data Recovery.
3. Select a partition or a location to scan.

Step 4: After waiting a few minutes, terminate the scan. Under Path or Type, find the files you want to recover and click Save. Choose a safe location to put the recovered files.

Bottom Line

The above seven ways can solve bad system config info errors caused by most common reasons. If you have problems in data recovery or backup, please leave a comment or email [email protected] to for help.