The update incorrectly identified Windows system files as being malware, and prevented these critical .exe and .dll files from running.
As you can imagine, this caused serious problems. That faulty update has been yanked and fixed, so you can allow your software to update.
A repair/fix tool was issued within hours.
Still, if anything has happened to you after an Antimalwarebytes update, here’s a link to the story:
http://www.techspot.com/news/52290-malwarebytes-update-disables-thousands-of-machines-fix-released.html
Here’s a link to the tool:
Anti-Malware FP Fix Tool here
"I want to offer my sincere apology to our millions of customers and free users," Kleczynski wrote on the company's blog. "More was expected of us, and we failed," he said, noting that the company is making immediate changes to prevent a repeat event, including additional layers to check the work of its researchers.
"I started this company because I thought everyone was entitled to malware-free computing. We acted overzealously in that mission and realize far superior procedures around updating are needed...My promise to you? Working day and night, we are commissioning several new resources to stop this from happening again."
Better late than never.