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Original message (Jan 27, 2018): Earlier this morning, we published a protection update that caused connection issues for many of our customers. As a side effect of the web protection blocks, the product also spiked memory usage and possibly caused a crash. We have triaged this issue and pushed a protection update that resolves it. If the update does not resolve the issue automatically for you, please shut down web protection, check for protection updates, and restart your computer. The root cause of the issue was a malformed protection update that the client couldn't process correctly. We have pushed upwards of 20,000 of these protection updates routinely. We test every single one before it goes out. We pride ourselves on the safety and accuracy of our detection engines. To say I am heartbroken is an understatement. We are working hard to not only triage your issues and get your computer or business back up and running but to also rebuild your trust. We are going to overhaul how we publish these protection updates so that this never happens again. I am personally available to discuss both on this forum via personal message or at mkleczynski@malwarebytes.com Updated message (Feb 2, 2018): I have split my time over the last five days helping many of you resolve remaining issues due to this weekend’s incident and listening to your feedback. A key takeaway was the need for fuller documentation on how we intend to prevent incidents like this in the future. You can find a response from Malwarebytes Research and Engineering outlining that here. For a complete description and root cause analysis please click here. Next week we will also be introducing a status page that indicates if Malwarebytes is having issues with any updates or with accessibility to any of our systems. The status page will be used to supplement customer communication, not replace it. If you're in need of steps to remedy the issue, please go here: For assistance on how to recover for home users, please click here For assistance on how to recover for corporate users, please click here Note: edits made by msherwood to adjust formatting and layout of Marcin's post.

One last note: turning off Web Protection temporarily is an interim solution. Team has identified issue, I will update everyone shortly.

All, we are triaging this as we speak. I will have more information for you all shortly. https://forums.malwarebytes.com/topic/219996-important-web-blocking-ram-usage-issue/

We're sorry you had issues with our program today. We've addressed the issue and here's what you need to do to fix it. If you're in need of steps to remedy the issue, please go here: For assistance on how to recover for home users, please click here For assistance on how to recover for corporate users, please click here To learn more about what happened, please go here: If you continue to have issues or run into new ones, please start a new thread and we'll happily look into that for you. Note: edits made by msherwood to adjust formatting and layout of Marcin's post.

As many of you have already seen, last week I blogged that we would be getting more aggressive in the detection of Potentially Unwanted Programs, or “PUPs” as we call them. I’d like to announce that we’re advancing that mission with the acquisition of AdwCleaner. AdwCleaner is a popular product, installed over 200 million times, and used by consumers, technicians, and enterprises all over the globe to remove adware, browser hijackers, other potentially wanted programs, and more. As I write this, it averages more than 200,000 downloads per day. Jérôme and Corentin, the two engineers that have maintained the project from very early on, will be joining the Malwarebytes team. Short term, we will work to give the product a facelift and enhance its detection ability. Over a longer period, we hope to learn from and integrate the technology into our flagship product, Malwarebytes Anti-Malware. AdwCleaner will remain free as a standalone product. Consumers and businesses download AdwCleaner more than 200,000 times per day, making it one of the most downloaded products on many sites. Installed around 200 million times, AdwCleaner has proven effective against bloatware, questionable software and specific types of malware. As a reminder, you can read more about our PUP classification criteria here! Learn more about AdwCleaner: https://www.malwarebytes.com/adwcleaner_welcome/. Download the free version of AdwCleaner: https://www.malwarebytes.com/adwcleaner/. Marcin

Please see below for a change log of our Malwarebytes' Anti-Malware product.