1. Why Windows Updates Break Printers:
Microsoft frequently updates Windows security protocols, specifically targeting how devices communicate over the network (like the infamous PrintNightmare vulnerability). These security patches often inadvertently block older printer drivers from communicating with the Print Spooler.
2. Run the Windows Printer Troubleshooter:
Windows has a built-in tool specifically designed to realign printer configurations after system changes.
- Go to Settings > System > Troubleshoot > Other troubleshooters.
- Find "Printer" and click "Run".
- Follow the on-screen prompts to allow Windows to detect and fix registry mismatches or spooler permission issues caused by the update.
3. Uninstall the Problematic Windows Update:
If your printer stopped working the exact day your PC updated, rolling back that specific KB (Knowledge Base) patch is the fastest fix.
- Go to Settings > Windows Update > Update history > Uninstall updates.
- Look at the dates and locate the most recent update (usually a 'Security Update' or 'Cumulative Update').
- Right-click the update and select Uninstall.
- Restart your computer and test the printer.
- If it works, you can use the 'Show or hide updates' troubleshooter tool from Microsoft to block that specific update from reinstalling automatically.
4. Re-add the Printer with Fresh Parameters:
Sometimes the update corrupts the specific port assignment for the printer.
- Go to Settings > Bluetooth & devices > Printers & scanners.
- Click on your printer and select "Remove device".
- Unplug the printer's USB cable, or disconnect it from Wi-Fi.
- Restart the PC.
- Plug the printer back in and click "Add device". Let Windows rediscover and configure the printer using the new system parameters.
5. Check for Manufacturer Firmware Patches:
When Microsoft changes Windows architecture, printer manufacturers must release firmware updates for their printers to remain compatible.
- Go to the printer manufacturer's support site.
- Search for your printer model and look for 'Firmware Updates'.
- Download and run the firmware updater tool to patch the printer's internal software to comply with the new Windows security standards.
Summary
Microsoft frequently releases secondary 'Out-of-band' patches to fix the printer bugs they introduced in their major updates. Always check for 'Optional updates' in the Windows Update menu if you are experiencing sudden printing issues after a Patch Tuesday.