Here's how to Fix Printer settings could not be saved error on Windows:
Restart the print spooler service - Open an elevated Command Prompt and run "net stop spooler" and then "net start spooler" to restart the service.
Make sure you have admin privileges - Log into the account that has administrator rights and try to change the printer settings again.
Update printer drivers - Outdated drivers can sometimes cause issues saving settings. Update to the latest.
Reset printer - In Devices and Printers, right-click the printer, select Properties - General tab and click "Reset device".
Delete and re-add printer - Remove the printer completely from Devices and Printers, restart computer, then add it again.
Create a new user profile - The issue may be related to a corrupted user profile. Create a new Windows user and test there.
Check disk space - Ensure there is sufficient space on the disk where settings are saved (usually the system drive.)
Save to file - Some printers allow saving settings to a file instead of the printer itself. Try exporting settings.
Check for viruses - A virus or malware on the system could potentially corrupt printer drivers and prevent saving.
Contact printer manufacturer - If the issue persists, contact the printer manufacturer's support for further troubleshooting.
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