https://wccftech.com/microsoft-out-of-band-windows-10-update-to-fix-printer-issue/

Windows 10 has received an emergency update that Microsoft is delivering to fix printer issues that were caused by last week's Patch Tuesday cumulative updates. March 2021 Patch Tuesday update was creating Blue Screen of Death (BSOD) for some Windows 10 devices. The issue impacted multiple printer brands, pushing the company to release an emergency fix.

"Microsoft identified an issue that affects Windows 10 devices which applied the March 2021 security update released March 9, 2021, and a resolution has been expedited," the company writes in the support document. "This known issue affects printing operations for devices using certain Type 3 printer drivers, which might receive an error with a blue screen when attempting to print."