WHAT'S HAPPENING?
Some users may be unable to access the network.


WHEN IS IT HAPPENING?
January 27, 2018, and ongoing.


WHY IS IT HAPPENING?
The Malwarebytes Anti-Malware (MBAM) client installed on many computers received a malformed definition update on January 27, 2018 that causes the MBAM client to block internet access.  More information can be found at the following sites.

https://www.bleepingcomputer.com/news/security/malwarebytes-update-released-to-fix-high-cpu-and-memory-usage-in-mbamservice-exe/