Why does my printer say the driver is unavailable?
Usually because the printer's driver has been withdrawn, blocked or superseded by an operating system update — and the modern answer is frequently that you no longer need one at all.
What changed. Operating systems moved toward universal print classes — standardised protocols such as IPP Everywhere, AirPrint and Mopria — that let a computer print to a supported printer with no manufacturer software whatsoever. At the same time, older manufacturer drivers stopped meeting security and signing requirements and were withdrawn.
"Driver is unavailable" therefore frequently means: the manufacturer driver you had is no longer supported, rather than that your printer has failed.
The common specific causes:
An operating system update removing or blocking an old driver, including drivers using deprecated architecture.
Third-party driver support removed for printers past their support period.
A corrupted driver installation, or a conflict between two versions.
Print spooler problems, which produce a range of odd symptoms.
The printer connected differently from when it was installed — the queue was set up for USB and the printer is now on the network, or vice versa.
Security changes restricting how printer drivers can be installed, introduced following vulnerabilities in printing subsystems.
What to do, in order:
Remove the existing printer queue entirely, then re-add it. Half of these problems are stale configuration rather than a genuine driver issue.
Add the printer using the built-in driverless option. Look for the printer appearing with a description such as IPP or AirPrint rather than a model-specific driver — it generally works for printing and basic settings.
Check the manufacturer's site for a current driver, and specifically for one matching your operating system version.
Restart the print spooler service, and clear any stuck jobs.
Update firmware on the printer itself, which frequently adds or fixes driverless support.
Connect by network rather than USB where possible, since network printing is better supported by driverless standards.
What you lose with a driverless connection: some advanced features — specific paper handling, colour profiles, ink level reporting and scanner functions — may need the manufacturer's application, which is separate from the print driver.