I know from web searching that the error message 0x80070643 relates to a lack of space, specifically in the recovery environment partition. And that I ...

The infamous "0x80070643 - ERROR_INSTALL_FAILURE" issue is back with one of the new Windows 10 updates KB5048239. Thankfully, there is a fix.

Here's what to do if this bug is preventing you from installing these important security updates for Windows.

Despite the message, Microsoft says this error does not impact the update or the device's functionality.