https://www.bleepingcomputer.com/news/microsoft/windows-april-updates-also-have-problems-with-mcafee-software/ > With the release of the Microsoft April 2019 Patch Tuesday updates, some Windows users began to discover that Windows 7 and 8.1 was suddenly booting slower or would freeze. It was determined that this was due to conflicts with antivirus software such as Sophos, Avast, AVG, and now McAfee. > In an update last week to the support articles for the Windows 8.1 KB4493446 update and the Windows 7 KB4493472 update, Microsoft has stated that there is an issue with McAfee business antivirus software that is causing Windows to boot slower or freeze.