The April cumulative update package from Microsoft brought problems not only to users of Windows 7. Certain difficulties arose for those who use Windows 10 (1809). According to available information, the update causes various problems that arise due to conflicts with anti-virus programs installed on user PCs.
Messages from users have appeared on the Internet that say that after installing the KB4493509 package, the speed of the OS has significantly decreased. Moreover, some users encountered the fact that the operating system simply hung when the installation of updates was completed and a reboot was performed. The operating system stopped responding to any requests or processed them for several minutes. Messages from users experiencing similar problems appeared not only on social networks and community forums, but also on the Microsoft support site.
Anti-virus software developers are also working to find out the reasons for the OS conflict with their products. For example, Avast reported that slowdowns in Windows may occur after installing KB 4493509 for Windows 10, as well as KB4493472, KB4493448 for Windows 7. It is reported that in order to fix problems, it is necessary to remove the patches mentioned above.
Source: 3dnews.ru