What Is a Printer Driver? (And Do You Still Need One?)

Quick answer: A printer driver is the translator between your computer and your printer. Your application produces a page; the driver converts it into the command language the printer actually understands. Modern printers increasingly skip the vendor driver entirely and use a built-in standard instead — but the change coming to Windows is narrower than the headlines suggest.

If you have ever hit "Printer driver is unavailable" and wondered what the driver was doing in the first place, this is the explainer.

What a Printer Driver Actually Does

Your word processor does not know how to talk to a printer. It produces a page description, and the driver turns that into instructions in a language the hardware understands — a page description language. It also exposes the printer's options to you: trays, duplex, paper sizes, quality settings, ink and toner levels.

PCL, PostScript and Host-Based Printing

HP developed PCL in 1984 for its early inkjets, and it spread far enough to become a de facto standard so that software could print to any brand of printer. Host-based printers are the odd ones out: they carry no page-description interpreter, so the computer does the heavy lifting and sends something close to a finished bitmap. That is cheap to build and it is exactly why old host-based models — the HP LaserJet 1018 is the classic example — get awkward on new operating systems and on print servers.

Driverless Printing: AirPrint, Mopria and IPP Everywhere

The industry's answer to driver sprawl is a common protocol. All three of the names you see on printer boxes are versions of the same idea:

• IPP Everywhere — maintained by the Printer Working Group. It makes it possible to print to network printers without special software, and it is supported by anything running CUPS 1.5 or later, which includes Linux, ChromeOS and macOS.
• AirPrint — Apple's version. Apple's position is that it lets you print from an iPhone, iPad or Mac "without the need to download or install drivers."
• Mopria — founded in 2013 by Canon, HP, Samsung and Xerox, and now the certification Microsoft leans on for standards-conformant printing and scanning.

What Is Actually Changing in Windows

This is widely reported as "Microsoft is killing support for old printers." That is not what Microsoft's own end-of-servicing document says. Two sentences in it matter most: existing printer drivers can still be installed on Windows PCs after the end of servicing, and Windows will continue to allow vendor-supplied drivers to be installed from separate installation packages. In other words, the manufacturer's downloadable installer keeps working.

What is genuinely changing is the Windows Update pipeline:

Two limits worth knowing: this plan covers Windows 11 and later, and Windows Server 2025 and later. Windows 10 is not in scope.

Windows Protected Print Mode: Read This Before You Turn It On

Windows Protected Print Mode is a security feature that uses only Windows Ready Print, Microsoft's modern print stack. Enabling it uninstalls third-party drivers and removes them from the driver store. If you later turn it off, the original drivers are reinstalled.

If your printer is older and not Mopria-certified, that is a reason to leave Protected Print Mode alone. It is not on by default; Microsoft documents it as something you enable.

Does a Generic Driver Cost You Features?

Yes, unless the manufacturer has done extra work. The IPP inbox class driver covers baseline printing. Anything printer-specific — custom finishing options, a vendor preferences dialog, supplies and status monitoring — comes from a Print Support App, which is the architecture Microsoft introduced so manufacturers could add customization without a legacy driver. If a printer has no Print Support App, class-driver printing is basic printing.

This is the practical reason ink and toner level reporting sometimes disappears after a driver change: the level display is a vendor feature, not part of the standard.

What About a Mac?

Apple's guidance is that most printers are compatible with macOS and that macOS automatically uses AirPrint when you add a printer. If AirPrint is not supported, Apple sends you to the printer manufacturer. Apple does claim enterprise-class finishing options for AirPrint, so the "you lose everything without a vendor driver" worry is overstated on the Mac side.

Frequently Asked Questions

What is a printer driver?
Software that translates your document into the command language your printer understands, and exposes the printer's options to your computer.

Will my old printer stop working on Windows?
Not because of this change. Microsoft's own document says existing drivers can still be installed and that vendor installation packages will keep working. What ends is publishing new drivers to Windows Update.

Does the change affect Windows 10?
No. The end-of-servicing plan covers Windows 11 and later and Windows Server 2025 and later.

Why did my ink levels stop showing?
Level reporting is a vendor feature. A generic class driver gives you baseline printing; the extras need the manufacturer's Print Support App or driver.

Should I turn on Windows Protected Print Mode?
Only if your printer is Mopria-certified. Enabling it uninstalls third-party drivers, which will break an older printer that depends on one.

See Also

• Printer Driver Is Unavailable — What Is Actually Going On and How to Fix It
• What Toner Does the HP LaserJet 1018 Use? (a host-based printer)
• What Is a Document Feeder (ADF) on a Printer?
• Find Ink by Printer Model
• Best Printers: Top Picks for Every Use Case and Budget

By William Elward, Founder of Castle Ink — 20+ years helping people solve printer and ink problems. Last updated August 24, 2026.