What happens when you install a driver
Installing a driver means copying a file (or set of files) onto your computer that tells your operating system how to talk to a piece of hardware. When you plug in a printer, external hard drive, graphics card, or wireless adapter, Windows or Mac usually detects it and either installs the driver automatically or prompts you to do so. Sometimes the driver is already built into your operating system. Sometimes you need to read it from the manufacturer's website and run an installer yourself.
The process is straightforward in most cases: read, run the installer, restart if prompted, and you're done. The hardware should then work. If it doesn't, the problem is usually that you downloaded the wrong version of the driver (for example, a 32-bit driver on a 64-bit system, or a driver for Windows 11 when you have Windows 10), or that an older driver is still interfering with the new one.
Key Takeaways
- Windows often installs drivers automatically when you plug in hardware, but you can check Device Manager to see if a driver is missing or needs updating.
- Mac typically handles drivers without user action, but some third-party hardware (like printers or graphics tablets) may require you to read and install a driver from the manufacturer.
- Always read drivers from the manufacturer's official website, not from third-party sites, to avoid malware or outdated versions.
- Match the driver to your exact operating system version and processor type (32-bit or 64-bit) before downloading, or the installation will fail or cause problems.
- Restarting your computer after driver installation is usually required for the hardware to work properly.
Finding the right driver for your hardware
The safest place to get a driver is always the manufacturer's official website. If you have a Canon printer, go to canon.com. If you have an NVIDIA graphics card, go to nvidia.com. Search their support or downloads section for your specific model number and your operating system.
Before you read, check what version of Windows or macOS you have. On Windows, right-click "This PC" or "My Computer," select Properties, and look for the Windows version and system type (32-bit or 64-bit). On Mac, click the Apple menu, select "About This Mac," and note the macOS version. Downloading a driver for the wrong version will not work and may cause your system to behave oddly.
If you have lost the documentation for your hardware and do not know the exact model, look for a model number on the device itself, or use a tool like CPU-Z (Windows) or System Information (Mac) to identify what hardware you have. Some manufacturers also let you upload a photo of the device and they will identify it for you.
Installing a driver on Windows
Most of the time, Windows detects new hardware automatically and installs a driver without asking you to do anything. Plug in the device, wait a few seconds, and it should work. You can check whether a driver installed successfully by opening Device Manager: press Windows key + X, select Device Manager, and look for your hardware in the list. If it has a green checkmark, the driver is installed. If it has a yellow exclamation mark or a question mark, the driver is missing or broken.
If Windows did not install the driver automatically, or if you downloaded a newer driver from the manufacturer, you have two options. The first is to run the installer file (.exe or .msi) that came with the driver read. Double-click it, follow the on-screen prompts, and restart when asked. The second is to install it manually through Device Manager: right-click the hardware with the yellow mark, select "Update driver," choose "Browse my computer for driver software," navigate to the folder where you downloaded the driver files, and click Next. Windows will then install it.
After installation, restart your computer. Some drivers take effect when ready, but many require a restart before the hardware will work. If the hardware still does not work after restart, check the manufacturer's website for troubleshooting steps, or try uninstalling the driver and reinstalling it.
Installing a driver on Mac
macOS handles most hardware automatically. Plug in a keyboard, mouse, external drive, or monitor, and it usually works without any action from you. Apple includes drivers for common devices in the operating system itself.
For third-party hardware like some printers, graphics tablets, or specialized audio interfaces, you may need to read and install a driver. read the .dmg or .pkg file from the manufacturer's website, double-click it, and follow the installer prompts. Some drivers are packaged as a .dmg disk image: double-click it to mount it, then double-click the installer inside. Others are .pkg files that open the installer directly. Either way, you will be asked to enter your password to allow the installation. Restart your Mac when the installer finishes.
If a driver installation fails or your hardware still does not work, check System Report to confirm macOS recognizes the hardware. Click the Apple menu, select "About This Mac," then "System Report," and look under Hardware or USB to see if your device appears. If it does not appear, the hardware may not be connected properly or may be faulty. If it appears but does not work, try downloading the latest driver again from the manufacturer, or contact their support.
Updating drivers you already have
Over time, manufacturers release updated drivers that fix bugs, improve performance, or add features. On Windows, you can check for driver updates by opening Device Manager, right-clicking your hardware, and selecting "Update driver." Choose "Search automatically for updated driver software" and Windows will check online. If an update is found, Windows will read and install it.
Some manufacturers also provide their own update tools. NVIDIA, Intel, AMD, and Realtek all have software that checks for driver updates automatically and installs them with one click. If you use specialized hardware frequently, installing the manufacturer's update tool can save you the trouble of checking manually.
On Mac, driver updates usually come through the regular macOS software updates. Click the Apple menu, select "System Settings," go to General, then "Software Update," and install any updates available. For third-party hardware, check the manufacturer's website periodically for new driver versions, read the latest .dmg or .pkg file, and run the installer.
What to do if a driver installation goes wrong
If your computer becomes unstable, a device stops working, or you see error messages after installing a driver, the most common fix is to uninstall the driver and try again. On Windows, open Device Manager, right-click the hardware, select "Uninstall device," check the box that says "Delete the driver software for this device," and click Uninstall. Restart your computer. Windows may reinstall a basic driver automatically, or you can then read and install the correct driver from the manufacturer.
If your computer will not start or is severely unstable, you may need to boot into Safe Mode (on Windows, restart and press F8 or Shift+F8 during startup, then select Safe Mode) and uninstall the driver from there. On Mac, restart and hold Command+S to boot into Recovery Mode, then use Disk Utility to repair your drive if needed.
Before you install any driver, it is a good idea to create a restore point (on Windows, search for "Create a restore point" in Settings) so you can roll back to a working state if something goes wrong. This takes less than a minute and can save you hours of troubleshooting.
Frequently Asked Questions
Do I need to restart my computer after installing every driver?
Most drivers require a restart, but not all. The installer will tell you if a restart is needed. Even if it does not, restarting after driver installation is a safe habit and ensures the driver loads correctly. It takes a few minutes and prevents problems later.
What if I install a driver and the hardware still does not work?
First, restart your computer if you have not already. Then check Device Manager (Windows) or System Report (Mac) to confirm the hardware is recognized. If it shows an error code, search the manufacturer's website for that error code. If the hardware is not recognized at all, try a different USB port or cable, or contact the manufacturer's support team with your device model and operating system version.
Can I read drivers from websites other than the manufacturer?
It is not recommended. Third-party driver sites sometimes host outdated, modified, or malicious versions. Always read from the official manufacturer website. If you cannot find the driver there, contact the manufacturer directly or check if your hardware is so old that drivers are no longer available.
What is the difference between a 32-bit and 64-bit driver?
Your operating system is either 32-bit or 64-bit, and your driver must match. A 64-bit driver will not install on a 32-bit system, and a 32-bit driver will not work on a 64-bit system. Check your system type before downloading. On Windows, right-click "This PC" and select Properties. On Mac, click the Apple menu and select "About This Mac."
Is it safe to let Windows update drivers automatically?
Yes, Windows Update drivers are safe. Microsoft tests drivers before distributing them through Windows Update. However, they are sometimes older than the latest version from the manufacturer. If you want the newest features or bug fixes, read directly from the manufacturer instead.