Fix Printer Error Code 45 (Brother, Canon, HP, Epson, Etc) Windows

Seeing Printer Error Code 45 can be frustrating, especially when you need to print an important document right away. This error commonly appears in Windows when the operating system cannot properly communicate with the printer. In many cases, the message is accompanied by a notification stating that the device is not connected to the computer.

The good news is that Printer Error Code 45 is usually not caused by a serious hardware failure. Instead, it is often related to connection issues, outdated drivers, incorrect printer settings, Windows service problems, or temporary system glitches.

Whether you use a Brother, Canon, HP, Epson, or another printer brand, the troubleshooting methods in this guide can help restore communication between your printer and computer. The instructions are written for beginners, so you can follow them even if you have never fixed a printer issue before.

What Causes Printer Error Code 45?

Windows Error Code 45 generally indicates that a hardware device is not properly connected or recognized by the operating system. When it affects printers, common causes include damaged USB cables, loose connections, outdated printer drivers, corrupted system files, disabled printer services, incorrect printer configurations, or temporary communication failures between Windows and the printer.

Identifying and addressing these issues can usually restore normal printer functionality.

Fix Printer Error Code 45 (Brother, Canon, HP, Epson, etc.)

Printer Error Code 45 typically occurs when Windows cannot detect or communicate with a connected printer. To fix the error, verify the printer connection, restart both devices, run the Windows Printer Troubleshooter, update or reinstall printer drivers, restart the Print Spooler service, and reconnect the printer. 

These steps resolve most Error Code 45 issues on Brother, Canon, HP, Epson, and other printer models.

Step 1: Verify the Printer’s Physical Connection

The first thing you should do is check whether the printer is properly connected to your computer.

If you are using a USB printer, make sure the cable is securely connected at both ends. Sometimes a cable may appear connected while being slightly loose. Disconnect the USB cable completely and reconnect it firmly.

If possible, try connecting the cable to a different USB port on your computer. USB ports occasionally stop functioning correctly due to driver issues or hardware faults.

If you use a wireless printer, ensure that the printer is connected to the same WiFi network as your computer. A network interruption can prevent Windows from detecting the printer properly.

Also, check whether the printer is powered on. Look for any warning lights or messages displayed on the printer’s screen. Resolve any paper jams, low ink warnings, or connectivity alerts before continuing.

After confirming the connection, try printing a test page. If Error Code 45 still appears, proceed to the next step.

Step 2: Restart Your Printer and Computer

A simple restart can often resolve temporary communication problems.

Turn off your printer completely. If the printer has a power button, press it and wait until the device shuts down fully.

Next, shut down your computer. Wait approximately one minute before turning both devices back on.

Start the printer first and allow it to finish its startup process. Once the printer is ready, turn on your computer.

When Windows loads, wait a few moments for the operating system to detect connected devices. Open your printer settings and check whether the printer appears normally.

Many temporary connection errors disappear after a complete restart because Windows reloads device drivers and refreshes communication channels.

Step 3: Run the Windows Printer Troubleshooter

Windows includes a built-in troubleshooting utility designed to detect and fix common printer problems automatically.

Open the Settings app by pressing Windows + I on your keyboard.

Select System and then choose Troubleshoot. Open Other Troubleshooters and locate Printer in the list.

Click Run next to the Printer troubleshooter.

The tool will scan your system for issues related to printer connections, printer services, drivers, and configuration settings. Follow any recommendations that appear on the screen.

If Windows identifies a problem, allow the troubleshooter to apply the suggested fix automatically.

Once the process is complete, restart your computer and check whether the printer functions correctly.

Step 4: Disconnect and Reconnect the Printer

Sometimes Windows loses track of a printer even though the device is physically connected.

Open Settings and navigate to Bluetooth & Devices, followed by Printers & Scanners.

Select the affected printer and choose the option to remove the device.

After removing the printer, disconnect its USB cable or disconnect it from the wireless network.

Wait about thirty seconds before reconnecting the printer.

Return to Printers & Scanners and select Add Device. Windows will search for available printers.

When your printer appears, select it and complete the setup process.

This process forces Windows to establish a fresh connection with the printer and often resolves Error Code 45.

Step 5: Update the Printer Driver

An outdated driver can prevent proper communication between Windows and your printer.

Press Windows + X and select Device Manager.

Expand the Print Queues section. Locate your printer and right-click on it.

Choose Update Driver and select the option to search automatically for updated drivers.

Windows will search for available driver updates and install them if found.

Updated drivers often include bug fixes, compatibility improvements, and performance enhancements that help eliminate connection-related issues.

After updating the driver, restart your computer and test the printer again.

Step 6: Reinstall the Printer Driver

If updating the driver does not solve the problem, reinstalling it may help.

Open Device Manager and locate your printer under the appropriate category.

Right-click the printer and select Uninstall Device.

Confirm the removal when prompted.

After uninstalling, restart your computer. Windows may automatically reinstall the driver during startup.

If it does not, download the latest driver from your printer manufacturer’s support website and install it manually.

A clean driver installation removes corrupted files and replaces them with fresh components, which can resolve persistent Error Code 45 problems.

Step 7: Restart the Print Spooler Service

The Print Spooler service manages print jobs and printer communication in Windows.

• Press Windows + R, type services.msc, and press Enter.
• Scroll through the list until you find Print Spooler.
• Right-click the service and select Restart.
• If the service is not running, choose Start.
• Next, double-click the Print Spooler service and ensure that the Startup Type is set to Automatic.
• Click Apply and then OK.

Restarting this service can clear printing errors and restore communication between Windows and the printer.

Step 8: Check Device Manager for Hardware Issues

Windows may identify hardware-related issues through Device Manager.

Open Device Manager and look for any devices displaying a yellow warning icon.

Pay particular attention to entries related to printers, USB controllers, or unknown devices.

If you see a warning icon, right-click the device and select Update Driver.

You can also uninstall the affected device and restart your computer so Windows can reinstall it automatically.

Resolving hardware detection problems can often eliminate Error Code 45.

Step 9: Install Windows Updates

Keeping Windows updated helps ensure compatibility with modern printer drivers and hardware.

• Open Settings and navigate to Windows Update.
• Click Check for Updates.
• Install all available updates, including optional driver updates if offered.
• After the installation process finishes, restart your computer.

Microsoft frequently releases updates that improve hardware compatibility and fix bugs affecting connected devices.

Step 10: Repair Corrupted System Files

Corrupted Windows files can interfere with printer detection and communication.

• Open Command Prompt as an administrator.
• Type the following command and press Enter: sfc /scannow
• The System File Checker will scan your computer for corrupted files and automatically repair them when possible.
• Wait for the scan to complete.

Afterward, restart your computer and check whether the printer is recognized correctly.

This step can resolve underlying Windows issues that contribute to Error Code 45.

Step 11: Test the Printer on Another Computer

If the error continues, connect the printer to another computer.

Install the necessary drivers and attempt to print a test document.

If the printer works normally on the second computer, the issue likely exists within the original Windows installation.

If the same error appears on multiple computers, the printer, cable, or network connection may require further inspection.

This test helps determine whether the problem originates from the computer or the printer itself.

Step 12: Perform a Printer Factory Reset

As a last troubleshooting step, consider resetting the printer to its factory settings.

Most printers provide a reset option within the settings menu. The exact location varies by manufacturer and model.

A factory reset removes custom settings, network configurations, and saved preferences.

After the reset, reconnect the printer to your computer and complete the setup process again.

Many persistent communication issues are resolved after a complete printer reset.

FAQs

What does Printer Error Code 45 mean?

Printer Error Code 45 generally means that Windows cannot detect or communicate with the printer properly. The issue is usually related to connectivity, drivers, or device recognition problems.

Can a damaged USB cable cause Error Code 45?

Yes. A faulty or damaged USB cable is one of the most common causes. Replacing the cable or trying a different USB port can often solve the problem.

Does Error Code 45 affect all printer brands?

Yes. The error can occur on Brother, Canon, HP, Epson, and many other printer brands because it is typically related to Windows device detection rather than a specific printer manufacturer.

Will reinstalling the printer driver fix Error Code 45?

In many cases, yes. Reinstalling the driver replaces corrupted files and restores proper communication between Windows and the printer.

Can Windows updates resolve the issue?

Yes. Installing the latest Windows updates may provide compatibility improvements and bug fixes that help Windows recognize the printer correctly.

Is Error Code 45 a hardware failure?

Not usually. Most cases are caused by software, driver, or connectivity issues. However, damaged cables, faulty USB ports, or hardware defects can occasionally contribute to the problem.