Malwarebytes Anti-Malware

One software that I always install on my personal computer or recommend to family and friends is Malwarebytes’ Anti-Malware – a free malware removal tool. It’s also one of the programs I use to fix/clean up client’s computers. Like I’ve mentioned before, I am the family desktop support person, so when family and friends need help, they go to me. The most common request I get from family, friends and clients is to clean up their computers which have been infected by viruses, spyware and malware.

When I get my hands on the “problem” computer, one of the first things I do is install Malwarebytes Anti-Malware. Before I perform a full system scan, I make sure that I update the program to it’s latest definition update. This is an easy task if there is an Internet connection. In some cases, the computers can’t connect to the Internet because of the virus, spyware and malware infection so this task becomes impossible. But I’ve found a workaround that allows me to manually update Malwarebytes Anti-Malware.

Today, I’ll share with you two ways on how to manually update Malwarebytes Anti-Malware so you can update the program even if your computer doesn’t have an Internet connection.


This step requires a separate computer that has access to the Internet and has Malwarebytes Anti-Malware installed on it.

1. Update the Malwarebytes Anti-Malware on that computer to make sure that you get the latest definition update.
2. Open the Malwarebytes Anti-Malware program folder and look for the file “rules.ref“.

Windows XP and Windows 2000
C:\Documents and Settings\All Users\Application Data\Malwarebytes\Malwarebytes' Anti-Malware\rules.ref

Windows Vista and Windows 7
C:\ProgramData\Malwarebytes\Malwarebytes' Anti-Malware\rules.ref

3. Copy the “rules.ref” file.
4. Paste the “rules.ref” file into the Malwarebytes Anti-Malware program folder on the computer that doesn’t have Internet connection.


1. Download the defintion update from the Malwarebytes Anti-Malware website.
2. Run and Install.

NOTE: The definition update provided in this link may not always be the latest compared to the definition updates received via built-in program update feature.

Those are the two simple steps on how to manually update Malwarebytes Anti-Malware. Just follow any of the steps and that’s it! Your copy of Malwarebytes Anti-Malware is now up-to-date. You can use this next time you need to update a copy of Malwarebytes Anti-Malware on a computer without Internet connection.

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Owner and editor of JaypeeOnline. Self-proclaimed geek. New media writer and consultant. WordPress advocate. Loves blogging, gadgets, video games and sports. You can follow him on Facebook or Twitter.


  • Raymond Danner, December 3, 2015 @ 12:46 AM Reply

    This answered a critical question I had concerning a client’s machine; they have a virus and don’t realize it. The virus is preventing all installers from running, and only browsers will run. Very strange stuff.

    Does MBAM’s Chameleon recognize the presence of the full (freeware) MBAM on the same drive and use that instead? Otherwise, it could get a bit problematic.

    I have Linux Mint 17.2 (Ubuntu-based Linux distro) but do a lot of Windows maintenance on clients’ machines.

  • terry, July 14, 2011 @ 1:23 PM Reply

    the link to the update does not work please does anybody have another link

  • Saul, June 30, 2011 @ 6:07 PM Reply

    I don’t see the rules file

  • JP Habaradas, December 10, 2010 @ 12:15 PM Reply

    @Troy – You’re welcome! Glad this article was able to help you fix/clean your dad’s infected computer. :)

  • Troy, December 10, 2010 @ 12:12 PM Reply


    the information is very helpful for my dads infected computer.

  • JP Habaradas, October 19, 2010 @ 5:45 PM Reply

    @icechen1 – Upgrading Malwarebytes Anti-Malware is fast and easy when you have an Internet connection. The steps provided in this post is intended to be used for a certain computer that can’t to the Internet. ;)

  • icechen1, October 19, 2010 @ 5:41 PM Reply

    For a anti-virus program, upgrading sure looks complicated.

  • JP Habaradas, October 16, 2010 @ 10:25 AM Reply

    @Jhay – You probably forgot about it coz you don’t use Windows that much anymore. Hehe

    Good to know that you’re back to using Ubuntu. Welcome back to the club! :D

  • Jhay, October 16, 2010 @ 10:24 AM Reply

    I used to have this program installed on my Windows machine but I forgot why I didn’t install it during my last system re-build.

    Besides, I haven’t used Windows for a month now because of Ubuntu. :P

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