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?