Malwarebytes for Windows 4.2.1 Release Notes Malwarebytes for Windows 4.2.1 released on September 16, 2020. Component package version 1.0.1070 - October 14, 2020 Improvements Detection and remediation. Performance. Updating functionality. Issues Fixed MB4.2.1 fails to communicate with the license server while 4.1.2 can. 0x139 MWAC BSOD under certain circumstances. IPv6 ping doesn't work with enabled MWAC. Some user interface (UI) issues. Component package version 1.0.1061 - October 5, 2020 Improvements Scan Report Usability. Detection and remediation. Performance. Issues Fixed W7 Install or Upgrade failure under certain circumstances. Fail to display "Malwarebytes is up to date" when the user interface (UI) is relaunched after a successful component update (CU) under certain circumstances. Protection updates could hang under certain circumstances and prevent scheduled scans from running Several UI issues. Component package version 1.0.1045 - September 16, 2020 Improvements Upgrade experience. Detection and remediation. Performance. Issues fixed License Status showed wrong renewal info. Signature verification caused BSOD on some 3rd party signed process images. Certain BSOD (in mbamchameleon.sys) Stack Overflow on x86 systems during initialization. Disabling Chrome/Edge shield is not working. Unable to Edit/Delete custom shields from the Protected applications dialog. Several UI issues.