Windows 11 Update Causes USB Printers to Print Random Gibberish

Microsoft confirms a bug in the January 2025 preview update that affects dual-mode USB printers, with a fix available through Known Issue Rollback.

The issue arises from Windows 11 23H2 update KB5050092, released as a preview in late January 2025, and impacts dual-mode USB printers supporting USB Print and IPP over USB protocols.
Affected printers may print unexpected text, often starting with 'POST /ipp/print HTTP/1.1,' due to the print spooler sending IPP protocol messages to the printer.
The bug is more likely to occur when printers are powered on or reconnected after being disconnected, leading to wasted ink and paper.
Microsoft has addressed the issue with Known Issue Rollback (KIR), allowing users and IT admins to reverse the problematic update and restore normal printer functionality.
A permanent fix is under development and will be included in a future Windows update, according to Microsoft.