To update your router’s firmware:

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1. Check the router manufacturer’s website for the latest firmware version.
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2. Backup the current settings of your router, if you want to keep them.
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3. Download the firmware from the manufacturer’s website to your computer.
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4. Connect your computer to your router using an Ethernet cable.
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5. Log into your router’s interface, using your computer’s web browser.
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6. Navigate to the update page typically found in the administrative settings.
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7. Browse and locate the downloaded firmware file.
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8. Install the new firmware version or upload the new firmware file.
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9. Allow the router to reset itself and complete the update process.