Windows 10 KB5003637 Changes and Improvements: Microsoft has added its support for the Windows 10 Home, Pro, and the Enterprise editions of both 32 bit and 64 bit OS.
It will automatically download and install through the Windows Update Clients. This update is released for Windows 10 2004, 20H2, and 21H1 versions as the monthly quality update. It seems like Microsoft released the half-baked update just with the latest security patches. Overall Windows 10 KB5003637 is a total mess. For some users, the installation was failed and paused halfway whereas for others it broke the critical elements such as Taskbar and the desktop.
It was automatically installed for most of the users and also created lots of issues for them.
Windows 10 Update KB5003637 was recently released on 8th June 2021.