There have been cases where printers of multiple brands do not print after installing Windows Update KB5004945 released on July 6, 2021.
All printers running Windows 10 Version 21H1, 20H2 or 2004, and all printers running Windows Server 20H2 or 2004.
Microsoft released KB5004237 to fix the issue.
SATO has not received any reports on such a case as of July 19. We will keep watch on the situation.
Support information from Microsoft:
Microsoft Support: July 13, 2021 — KB5004237 (OS Builds 19041.1110, 19042.1110 and 19043.1110)
Microsoft Support: July 6, 2021 — KB5004945 (OS Builds 19041.1083, 19042.1083 and 19043.1083) Out-of-band