Windows 10: mrxsmb.sys BSOD but with Driver signature enforcement OFF, it's OK!

Guys, i'm lost at this...

After some May update my W10 started crashing all the time. Safe mode minimal it's ok, but Same Mode with networking it is not.

SYSTEM_SCAN_AT_RAISED_IRQL_CAUGHT_IMPROPER_DRIVER_UNLOAD (d4)
mrxsmb.sys+51030

The weird thing is that if i disable Driver signature enforcement on startup options, it's boots and works fine. I think i have uninstalled some update, but same result. No new drivers were installed, unless that May cumulative update from MS had newer ones. I also disabled SMB direct on optionalfeatures.exe.

Version 1909 build 18363.836

Any ideas?

:)

 

disable driver signature enforcement

Hi Barbara,

To resolve this issue, let's use the command prompt to disable driver signature enforcement permanently on your computer. To disable, follow the steps below:

• Click the Start button.
• On the search bar, type Command Prompt and then right-click
  Command Prompt in the results.
• Select Run as Administrator, and then select Yes.
• On the command prompt, enter bcdedit.exe /set nointegritychecks on and press
  Enter.
• Restart your computer.

Note: Doing this step will disable driver signature enforcement permanently and will make your computer vulnerable to driver issues.

Keep us updated with the results.

 

How to disable driver signature enforcement permenently.

Hi Ashan,

Driver Signature Enforcement is one of the security features that we make to make sure that only signed drivers can load on your system. Take note that disabling driver signature enforcement will install drivers that weren’t officially signed. To disable
driver signature enforcement permanently, you can follow the steps below:

• Open an elevated Command Prompt. To do this, press the Windows
  key, type Command Prompt, press right click on the
  Command Prompt and select Run
  as administrator.
• Type or paste the following:
  
  bcdedit.exe /set nointegritychecks on
  
• Restart your computer.

If you want to enable the driver signature enforcement, just follow the steps above and type or paste the following:

bcdedit.exe /set nointegritychecks off

Should you need further assistance, don't hesitate to get back to us.

 

Disabling driver signature enforcement

Hi Fabio,

Driver Signature Enforcement is one of the security features that we make to make sure that only signed drivers can load on your system. Note that disabling driver signature enforcement will install drivers that weren’t officially signed. Install only the
drivers you trust. Follow these steps:

• Go to Settings > Update & security >
  Recovery > Advanced startup > Restart now.
• Choose Troubleshoot > Advanced options >
  Startup Settings > Restart > F7 or 7.

Once it restarts, you may now install any third party drivers. Note that the next time you device restarts, driver signature enforcement will be enabled again.

Let us know if you need further assistance.