The out-of-band update is KB5001567 for Windows 10 version 2004 and 20H2, and it includes a fix for a bug that “might cause a blue screen when you attempt to print to certain printers using some apps.”
The March 2021 update cycle included new cumulative updates for all Windows 10 devices, but as Microsoft itself acknowledged shortly after the release, they also came with a bug that caused some computers to encounter a fatal crash when trying to print.
“After installing this update, you might receive an APC_INDEX_MISMATCH error with a blue screen when attempting to print to certain printers in some apps,” Microsoft said.
According to multiple reports, Feedback Hub , it looks as though there is a growing number of users unable to install the latest Windows update on their hardware.
If your device is affected and is trying to update directly to April 2021 security patch, it could fail with one of the following error messages:
These error when downloading KB5001330 update has been reported by a lot of users in the Feedback Hub
“Getting aforementioned error on any attempt to install this update. Have run standard DISM and SFC command, and performed a basic reset of Windows Update,” a user wrote in the Feedback Hub.
Getting a consistent failure of KB5001330 to install with error code 0x800f0984. This is happening on Surface Studio 2 and Pro 7. This is the second month in a row Microsoft has been unable to the cumulative update on machines. The install pauses at 20%, then again at 73% (different from last month’s 40%), then at 100%, then fails.