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Win7 SafeMode MWB3.5 setup fails 406:120 couldn't open proc

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I had issues with my WIn7 Pro SP1 64-bit laptop (an HP Envy 15 Notebook, i7-4720HQ) suddenly having the network stop working and the entries in DeviceMgr seem corrupt, so ...

1. Booted into Safe Mode (no networking)

2. Tried to run MWB (last version I had on this older laptop), it failed with Couldn't open proc 406:120

3. Tried MWB uninstall, also failed with similar error

4. Copied mbam 3.5 install, and various clean/support/check utils from a USB stick (I downloaded them on another PC that is fine)

5. Ran both mbam-clean- and mb-clean-, both completed fine.

6. Checked certmgr.msc, no MWB-related Untrusted Certificates present

6. Tried to install mb3-setup-consumer-

7. Got similar error (attached setup #001 log and error details dialog contents).


Setup Log 2018-07-17 #001.txt

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Hello and Welcome

If you haven’t already done so, please run the Malwarebytes Support Tool and then attach the logs in your next reply:
NOTE: The tools and the information obtained is safe and not harmful to your privacy or your computer, please allow the programs to run if blocked by your system.

  • Download Malwarebytes Support Tool
  • Once the file is downloaded, open your Downloads folder/location of the downloaded file
  • Double-click mb-support-X.X.X.XXXX.exe to run the program
    • You may be prompted by User Account Control (UAC) to allow changes to be made to your computer. Click Yes to consent.

  • Place a checkmark next to Accept License Agreement and click Next
  • You will be presented with a page stating, "Welcome to the Malwarebytes Support Tool!"
  • Click the Advanced Options link
  • Click the Gather Logs button
  • A progress bar will appear and the program will proceed to gather troubleshooting information from your computer
  • Upon completion, click OK
  • A file named mbst-grab-results.zip will be saved to your Desktop
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One of our experts will be able to assist you shortly.

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I am in Win7 Safe Mode (with no networking or command prompt).

When I try to run mbam-support-, it crashes with this error:


mbstub.exe has stopped working


Problem signature:
  Problem Event Name:    APPCRASH
  Application Name:    mbstub.exe
  Application Version:
  Application Timestamp:    5b1acb3c
  Fault Module Name:    mbstub.exe
  Fault Module Version:
  Fault Module Timestamp:    5b1acb3c
  Exception Code:    40000015
  Exception Offset:    001247b7
  OS Version:    6.1.7601.
  Locale ID:    1033
  Additional Information 1:    6ac4
  Additional Information 2:    6ac4267233eb42f9537fb9cbe95bc2b4
  Additional Information 3:    e5b8
  Additional Information 4:    e5b8dd6588014878a76d6275082685f0

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  • Staff

Please try running the special build of Malwarebytes Anti-Rootkit as instructed in this topic (if it doesn't work in normal mode, then please try running it from Safe Mode with Networking).  Scan with it and have it remove anything it detects then reboot to complete the removal process if prompted.

If any issues still persist, then please try running ADWCleaner and scan with that, again restarting to complete the removal process if any threats are found.

If the problem still isn't resolved then please read and follow the instructions in this topic as best you can then create a new topic in the malware removal area including the requested logs and info by clicking here and one of our malware removal specialists will assist you as soon as they are available.

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Btw, the WIn 7 laptop with the problems cannot access networking no matter how I boot it up.

I am transferring the tools you suggest via USB from another WIn7 desktop that does work fine and is networked, and only plugging it into the laptop when it is in Safe Mode to copy the files off of it, then ejecting the USB stick before I even attempt to execute anything.

Just letting you know that, so I will still boot into Safe Mode with Networking if you desire, although I won't be making use of the network since it is part of the overall problem it seems.


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  • Staff

OK, so you have verified that the internet doesn't work even in Safe Mode with Networking?  That's fine, hopefully Malwarebytes Anti-Rootkit will still be capable of dealing with the issue, assuming it is being caused by an infection.  Otherwise, there are several parts of the ADWCleaner process which are designed to help with networking issues located under Settings in the Basic Repair Actions section.  They are worth a try if the scans don't do the trick:


You should just need to enable each option then initiate a scan and they should run as a part of the scan/cleanup process.  If you have trouble with it you may either seek assistance in the ADWCleaner sub-forum by starting a new topic in that area by clicking here or you may seek assistance in our malware removal forum by following the instructions I provided above in my previous post.

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