Today ( 08/05/2018 ) Microsoft rolled out KB4103721 cumulative update for Windows 10 PCs running April 2018 update version 1803. While the cumulative update KB4103721 was focused on fixing bugs ( Such As chrome crashes, App-V, VPN, time zone, Remote Desktop) But now it seems that it might just have added another issue. Several users report seeing a Black screen with infinite loading white dots in a circle after installing the cumulative update KB4103721.
“The update is bricking my computer. After the update (KB4103721) download and installs, after restarting my computer will hang on a black screen and do nothing. The only way to fix it is to restore my PC to a previous restore point, where the PC will boot up normally again. Automatic Updates then installed the update again and the issue returned. After a restore point, my PC booted again. Please fix this update so I can use my PC.”
The issue was first reported on Microsoft Community forum and since then several users have shared all sorts of different errors with the latest update. However, Microsoft hasn’t officially acknowledged the issue or shared anything regarding this matter.
If you’re facing this issue then you can go to safe mode and restore back to the point before installing the update. Then disabled that update (KB4103721) for now using the ‘Download the “Show or hide updates” troubleshooter package now.‘ package from MS.
Or completely uninstall windows 10 version 1803 and downgrade (In Advanced options, click “Go back to the previous build” ) to Windows 10 Fall Creators Update version 1709. However, restoring will work only if you haven’t deleted the windows.old and $windows.~bt folders from the system.
This should serve as the temporary fix until Microsoft acknowledges the issue and releases a permanent fix. For now, it would be suggested to stay away from the latest cumulative update. Also Checkout this Startup Stuck At Black Screen With Cursor After Windows 10 version 1803 Upgrade