The usb port won't work on my acer extensa 4630z laptop

Your USB ports on your computer are plug and play. If you have issues with your USB port, it is port related, driver related or device related. The following solutions will help you identify the problem to resolve your USB port issues.
To Identify a Working USB Port
Begin troubleshooting your USB ports by checking Device Manager to see if your USB ports or hubs are working properly.

1. Click the Start button. ClickControl Panel.
2. ClickSystem and Maintenance.
3. ClickDevice Manager.
4. Double-clickUniversal Serial Bus controllersand check to see if all your USB ports, hubs and controllers are functioning correctly. Any devices not functioning will have a yellow exclamation mark in front of them.
5. If Device Manager shows any USB ports, hubs or controllers are not functioning, check for updated drivers.

To Update the USB Port Driver

• Information onHow to Download and Install a Driver

• Watch a Video on Steps to Update Bios on Your Computer.
1. When the update process is complete, your computer will restart again to load the operating system with the new driver version installed.

Hi,
Did you install any Anti virus . Check the USB port for any physical damage. Try connecting a mouse with USB port to check if its working. After all this then the issue remain the same then the USB port needs an replacement.
Regards.