From bleepingcomputer.com
Since the middle of December 2018, numerous complaints have been pouring in that state Windows 7 had started freezing after a component of Malwarebytes was upgraded to a new version. Once users, disabled the Malwarebytes, Windows 7 would not longer freeze.
According to these reports, this problem appears to have started after users upgraded Malwarebytes to a new version and the component package version was upgraded to 1.0.508. This is the version that is currently being offered on Malwarebytes’ site and was also being installed via program updates.