I have the same problem since yesterday. Computer is freezing shortly after booting. I get the message on every program, that window is not responding. Have to boot in safe mode. As soon as I deactivate Malwarebytes Services, everything is working well.
I already updated to 3.4.4 before, it has to do with a signature update, released somewhere after Thursday, 8.3.2018. On Wednesday, everything was well with 3.4.4.