What is Driver?

In plain English

A driver is a small piece of software that lets your computer or phone "talk" to a bit of equipment, like your printer, webcam, mouse, headphones or Wi-Fi adapter. Windows (or Android) doesn't automatically know how every gadget in the world works, so each one comes with a driver that acts as a translator between the device and your machine.

Think of it like a power adapter you take on holiday. The kettle and the foreign socket can't connect on their own, they speak different "shapes" — but the adapter sits in the middle so they work together. A driver does the same job in software: it sits between Windows and your printer so the two can understand each other.

Why it matters

When a driver is missing, out of date or has gone wrong, the gadget simply stops behaving. That's the real reason behind a lot of everyday frustrations: a printer that suddenly "can't be found", a webcam that won't switch on for a video call, sound that disappears, or Wi-Fi that drops off after a Windows update. Knowing it's usually "just a driver" can save you from assuming the whole device is broken and rushing out to replace it. Out-of-date drivers can also leave small security holes, which is one more reason to keep them current.

What to do

• Restart first. A simple reboot reloads drivers and fixes a surprising number of "device not working" moments before you do anything clever.
• Let Windows Update do the heavy lifting. On Windows, most drivers arrive automatically through Windows Update — keeping updates switched on keeps your drivers fresh too.
• Get drivers from the right place. If you do need one manually, only download it from the maker's official website (HP, Canon, Dell and so on). Never trust pop-ups or random sites promising to "update all your drivers" — those are a common trick for sneaking in unwanted software.
• Don't panic. A device that worked yesterday and not today is far more often a driver hiccup than a dead gadget. It's usually a quick fix.

How 365 Techies can help

If a printer, webcam or other gadget has stopped playing nicely, we can often sort the driver out remotely while you watch — no need to unplug everything and bring it in.

Related: Operating system · Malware · BIOS · App vs program — or browse the full A–Z jargon buster.