Windows 7 Installed Windows 7 and Keyboard doesnt work (Laptop + Clean install)

[jdotjdot7]

Hello, I have a HP Pavillion DV4-1275mx laptop. With Windows Visat x64. I recently installed Windows 7 Ultimate x64 in a seperate partition of my Hard Drive with a clean install. At first it worked great. Then, I turned it off and let it install 34 updates. When I turned my Laptop back on. My Keyboard did not work at all in Windows 7. How can I fix this?

 

[twwilliams]

have you tried plugging in an external keyboard and mouse to see if you have any functionality with those?

 

[Trouble]

From within the Windows 7 OS, open device manager.
Right click computer, choose properties, then from the resultant page select Device Manger from the top of the column on the left.
Expand Keyboards, right click the problem device, choose properties, select the driver tab at the top and see if there is an option to roll back the driver.