Microsoft has released out-of-band emergency updates to fix Windows 10 bug discovered this month. It should be reminded that after the release of the March patchset from Microsoft, Windows users have experienced an error condition "APC_INDEX_MISMATCH". In the process of using the printer, the OS displayed BSOD error screen and stopped working.

It is important to note that these updates will not be installed automatically as they are optional. To install the available updates, users have to open Windows Update in the settings and check for updates. You’ll then be able download the patches manually and install them.

Source: anti-malware.ru