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I have a self-built computer with an ASUS F2A55-M LK Plus motherboare running Windows 7 Pro x64.  I am trying to install Malware Bytes and when I run setup the progress bar gets almost to the end and I get an error message:

Error writing to registry key:  HKEY_CLASSES_ROOT\malwarebkyktes\shell\open\command

RegSetValueEx failed; code 5.

Then I have three choices:  Abort, Retry, Ignore.

 

I have used Malware Bytes on many computer and this is the first time I have ever had any trouble installing.  Thanks. 

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Greetings and welcome,

For some reason it seems that permissions may not be set correctly for that key in the registry.  Either that, or the installer isn't being launched with the necessary permissions.

Permissions on the key should look like the following:

Permissions.png.ae3ba2413fd95cb617ef6c6199733737.png

As for the installer, it should be run from an Administrator type user account and User Account Control should be Enabled, otherwise it will not work correctly.

If the problem is permissions on the registry key and you were already running from an admin account with User Account Control active, then you'll need to reset the permissions for Administrators on the system to correct permissions on the registry.  To do this, please do the following:

Reset Default Permissions in Vista and Windows 7 using SubInACL:

  • Please download SubInACL from here and install it.
  • Then please copy and paste the following text exactly as written into notepad (not wordpad or any other text editor):
    @color 48
    @echo off
    if not exist "%programfiles(x86)%" "%programfiles%\Windows Resource Kits\Tools\subinacl.exe" /subkeyreg HKEY_LOCAL_MACHINE /grant=administrators=f
    if not exist "%programfiles(x86)%" "%programfiles%\Windows Resource Kits\Tools\subinacl.exe" /subkeyreg HKEY_CURRENT_USER /grant=administrators=f
    if not exist "%programfiles(x86)%" "%programfiles%\Windows Resource Kits\Tools\subinacl.exe" /subkeyreg HKEY_CLASSES_ROOT /grant=administrators=f
    if not exist "%programfiles(x86)%" "%programfiles%\Windows Resource Kits\Tools\subinacl.exe" /subdirectories %SystemDrive% /grant=administrators=f
    if not exist "%programfiles(x86)%" "%programfiles%\Windows Resource Kits\Tools\subinacl.exe" /subkeyreg HKEY_LOCAL_MACHINE /grant=system=f
    if not exist "%programfiles(x86)%" "%programfiles%\Windows Resource Kits\Tools\subinacl.exe" /subkeyreg HKEY_CURRENT_USER /grant=system=f
    if not exist "%programfiles(x86)%" "%programfiles%\Windows Resource Kits\Tools\subinacl.exe" /subkeyreg HKEY_CLASSES_ROOT /grant=system=f
    if not exist "%programfiles(x86)%" "%programfiles%\Windows Resource Kits\Tools\subinacl.exe" /subdirectories %SystemDrive% /grant=system=f
    if exist "%programfiles(x86)%" "%programfiles(x86)%\Windows Resource Kits\Tools\subinacl.exe" /subkeyreg HKEY_LOCAL_MACHINE /grant=administrators=f
    if exist "%programfiles(x86)%" "%programfiles(x86)%\Windows Resource Kits\Tools\subinacl.exe" /subkeyreg HKEY_CURRENT_USER /grant=administrators=f
    if exist "%programfiles(x86)%" "%programfiles(x86)%\Windows Resource Kits\Tools\subinacl.exe" /subkeyreg HKEY_CLASSES_ROOT /grant=administrators=f
    if exist "%programfiles(x86)%" "%programfiles(x86)%\Windows Resource Kits\Tools\subinacl.exe" /subdirectories %SystemDrive% /grant=administrators=f
    if exist "%programfiles(x86)%" "%programfiles(x86)%\Windows Resource Kits\Tools\subinacl.exe" /subkeyreg HKEY_LOCAL_MACHINE /grant=system=f
    if exist "%programfiles(x86)%" "%programfiles(x86)%\Windows Resource Kits\Tools\subinacl.exe" /subkeyreg HKEY_CURRENT_USER /grant=system=f
    if exist "%programfiles(x86)%" "%programfiles(x86)%\Windows Resource Kits\Tools\subinacl.exe" /subkeyreg HKEY_CLASSES_ROOT /grant=system=f
    if exist "%programfiles(x86)%" "%programfiles(x86)%\Windows Resource Kits\Tools\subinacl.exe" /subdirectories %SystemDrive% /grant=system=f
    del /f /q %0
    Once you've done that click on File and select Save As...
  • In the Save dialogue box click on the drop down menu next to Save as type and select All Files
  • Name the file reset.bat(the .bat extension is very important)
  • Save the file to your desktop and right click on it and select Run as administrator then click Continue at the User Account Control prompt.

Once that's done, try installing Malwarebytes again and see if the error is now gone or not and let me know how it goes.

Thanks

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Thanks exile360 for the repy.  I did have Users Account turned off.  When I turned it back on Malware installed.  Thanks again for the help.

 

Later:  I had to come back with this bit of info.  I have two self-built computers in my study.  One has an ASUS F2A55-M LK Plus board and the other has an ASUS F2A55-M LK board.  The Plus board is the one that I couldn't get Malware to install on until I turned on User Account.  The other board installed Malware with the User Account turned off.  Don't know if this is important as something on the Plus board may cause problems with Malware as the other board installed easily.  Thank.

Edited by kemperhills
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It is possible to install Malwarebytes with User Account Control turned off as long as you run the installer as administrator or it is launched with administrative privileges by another process that does have administrative (or higher) privileges.  That could explain why it was able to install on the other system without errors.

Just make sure that it works on both systems and you should be fine.  You can check by trying to run a scan with Malwarebytes and you can also check Task Manager to make sure that MBAMService.exe is running when your scan is running and that it is running under SYSTEM for the User Name.  You can also check to make sure that you are able to right-click on a file or folder and that you find the Scan with Malwarebytes option listed when you do.

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