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could not be called.

The Malwarebytes runtime error is a common problem that occurs when installing an application on a Windows computer. How do I get rid of the installation problem? Make yourself comfortable. In this article you can read the possible solutions for this error.

If you try to install malicious bytes on a Windows computer, you may see an error window with the following error message: runtime error (at xx : xxx) : could not call proc.

In most cases, this error is related to the %TEMP% folder. Malwarebytes for Windows needs to save files in the %TEMP% folder during installation. If this folder is located on the network or on a RAMDisk (Random Access Memory Drive), a runtime error occurs during the installation of Malwarebytes.

Of course, other factors can also cause the malware to malfunction: Can’t cause proc problems, like. B. A corrupt system file, logical errors on the hard drive, etc. Fortunately, there are a few methods you can try to solve this problem.

What caused the runtime error when installing malicious bytes (Couldn’t Install Proc)

  • Installing a corrupted Malwarebytes : If this problem occurred after a failed Malwarebytes installation, it is likely that you are seeing this error code because you still have residual files from the corrupted installation. In this case, you can use Malwarebytes’ support program to remove the remaining files.
  • Untrusted certificate from Malwarebytes: If you are experiencing this issue on Windows 10, it is likely that this error code is being displayed because your system has deemed the security certificate that Malwarebytes requires as untrusted. In this case, you can solve the problem by using the certificate manager to remove the Malwarebytes certificate and install all pending Windows updates before retrying the installation.
  • Corrupted system files : Under more difficult circumstances, you can expect this problem to occur due to some corruption in some Windows files. In this case, the first attempt to solve the problem is to use some built-in utilities that can repair damaged system files (DISM and SFC). If this fails, consider a repair or reinstallation.
  • The %TEMP% folder is in a different location: It turns out that one of the most common cases where this problem occurs is a scenario where the TEMP folder is on the network or on the RAMDRIVE or RAMDISK and not in the default location. If this is the case, you should be able to solve the problem by resetting the Temp folder to its default location.
  • Logical errors on the hard disk of the operating system : According to some concerned users, this problem can also occur in situations where the operating system’s hard drive contains logical errors that affect its ability to securely store newly created files. In that case, you should run a CHKDSK scan and see if that fixes the problem.
  • Remnants of malware/vulnerable code files : According to the Malwarebytes team’s security message, this issue can occur if the operating system’s hard drive currently contains files that actively prevent certain security packages from being installed. Users who also encountered this issue could fix it by running a third-party security scan.

Fix the Malwarebytes installation error (Proc could not be installed)

updated February 2021:

We now recommend that you use this tool to fix the error. The tool also repairs common computer errors, protects against file loss, malware and hardware failures, and optimizes your PC for optimal performance. With this software, you can fix computer problems quickly and prevent others from getting them:

  • Step 1: Download the PC repair and optimization utility (Windows 10, 8, 7, XP, Vista – Microsoft Gold Certified).
  • Step Two: Click on the Start scan button to detect problems in the Windows registry that may be causing PC problems.
  • Step Three: Click the Fix All button to fix all issues.

Reset %TEMP% folder to default

As mentioned above, the location of the %TEMP% folder is incorrect. The folder is usually located on the RAMDRIVE, RAMDISK or on the network and not in its original location. In this case, it is sufficient to move the %TEMP% folder to the desired location and then try the installation process again. To do this,

  1. First, download the latest version of Malwarebytes from the official website.
  2. Now start the RUN prompt by pressing WINDOWS + R simultaneously.
  3. Type cmd in the empty dialog box and click OK. This will open a command line window for you. If you see the UAC (User Account Control) option, click Yes and you will gain administrator privileges for the Command Prompt window.
  4. Type or copy the following commands in order into the command prompt window and press Enter after each command.
    Set TEMP=C : Windows Emp
    Set TMP=C : Windows mp
    cd %USERPROFILE% Downloads
  5. Once all entered commands have been processed, you can close the command line window.
  6. Now go to the Malwarebytes installation file (which you downloaded in the first step), right-click on it and select Run as administrator from the submenu.
  7. Now try to install the malware bytes and check if the mentioned problem keeps occurring and if a runtime error message (83:120) is displayed: You can’t say it’s a process or not.

Start CHKDSK analysis

Any problem with a conventional or solid-state drive can also result in a runtime error (83:120) : For some users, the Proc message cannot be accessed.

It can also be caused by incompatible data blocks or a logic error. Affected users have tried to correct this by running a CHKDSK scan. To do this,

  1. First press WINDOWS + X to open the WinX menu.
  2. Now click Command Prompt (Admin) in the WinX menu to launch the Advanced Command Prompt (if you see the UAC (User Account Control) option, click Yes to give yourself administrator privileges in the command prompt window).


  1. Start the RUN prompt and type cmd in the empty dialog box, then click OK. The command line window opens. If you see the User Account Control (UAC) option, click Yes and get administrator access to the command prompt window.
  2. Now type Chkdsk X in the command prompt window:

OPINION: Here, X is the drive letter corresponding to your computer’s hard disk partition (the one you want to check with CHKDSK). This is followed by the parameters that CHKDSK should use to perform the verification. Then press the Enter key.

When you run the CHKDSK utility from the extended command line, you can use any of the following parameters:

/f – Tells CHKDSK to fix any errors it finds.

/r – Tells CHKDSK to find bad sectors on the hard drive and attempt to recover all readable information from those sectors.

/x – Instructs CHKDSK to disconnect the selected disk before it is scanned.

  • The last command you enter on the extended command line is the following:

CHKDSK D: /f /x (if you want CHKDSK to shut down your computer’s D drive and then find and fix errors).


CHKDSK C: /f (if you want CHKDSK to find errors on your C drive and try to fix them).

  • Now wait until the CHKDSK scan is finished. It will then try to fix most of the errors on your system. After that try to install the malware bytes and see if the problem is solved or not.

Message: The above method works on Windows 7, 8, 8.1 and 10.

Perform CFS and DISM scan

Most likely you are dealing with some kind of system corruption, which also causes a runtime error (83:120): failed to call proc. In this case, it is recommended to carry out the FCS and DISM analyses one after the other. This is done as follows,

To scan the CFS :

  1. First open a command line window. Make sure you open it with administrator privileges.
  2. Now type sfc /scan into the prompt window and press Enter. It scans for damaged or outdated system files.

Message: SFC scanning is completely local and does not require an internet connection to operate. However, to perform a DISM scan, the user must have a stable Internet connection.

To perform a DISM scan :

  • First open a command line window. Make sure you open it with administrator privileges.
  • Now type the following commands into the command prompt window and press Enter each time:

Delete / Online / Clean image / Health check
Delete / Online / Clean image / ScanHealth
Delete / Online / Clean image / ScanHealth

  • The scanning process may take some time, so please wait and let the scanning process run its course.
  • If you passed both scans, try installing Malwarebytes and check for runtime errors (83:120): The process error cannot be corrected or remains.

Troubleshooting certificate problem

If your computer reports that the Malwarebytes certificate needed to install the utility is an untrusted certificate, this can sometimes result in a runtime error (83:120): Impossible to relay the proc message.

In such a scenario, it is recommended to remove the entry pointing to malicious bytes from the list of untrusted certificates using the Certificate Manager utility. To do this,

  1. Open the RUN prompt and type certmgr.MSC in the empty dialog box, then click OK. This will take you to the Certificate Manager utility. When prompted to use User Account Control (UAC), click Yes to allow administrative access.
  2. Now go to the left menu of the certificate manager window and select the Untrusted Certificates option. Then double-click on the certificates that appear in the right-hand menu.
  3. Then browse through the list of certificates, right-click on each item associated with the malicious bytes, and select Remove.
  4. After removing all Malwarebytes items, update all available Windows updates and reboot the system.
  5. After successfully rebooting the system, try installing Malwarebytes and see if the problem is resolved or if it persists.

These are all possible solutions that will help you to avoid the Malwarebytes : Proc. could not be called. This problem can be caused by many things, but because it has been around for so long, there are reliable solutions.

RECOMMENDED: Click here to diagnose Windows errors and optimize system performance.

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