If users follow the Windows Update Twitter account, they may have seen them.

Now, lets see them one by one.

This issue was firstly reported in late May.

Microsoft removes Windows 10 1903 upgrade blocks

Then, Microsoft has applied a compatibility hold on devices with this app to safeguard the update experience.

Currently, Microsoft has fixed this issue and the compatibility hold has been removed.

To protect the update experience, Microsoft also applied a protective hold on Windows 10 version devices.

Now, this issue is also fixed and the safeguard hold has been removed.

This is one of the issues first reported in the May 2019 Update.

This occurs because of the incorrect drive reassignment during the system installation process.

Now, Microsoft also removes compatibility hold.

Microsoft now blocks Surface Book 2 users from upgrading to version 1903 and it is working on a fix.