Hi I installed the update eventually but found my keyboard had stopped working. Did the reinstall driver etc, troubleshoot, all with no solution. restart brings it back for a undefinable period, maybe a few mins to several hours. the num lock light remains on but no action on key press, the keyboard is ps2. mouse is wireless. Device manager shows a HID keyboard device as first and ps2 keyboard second. tried deleting the HID but windows just re installs it. I can initiate the screen keyboard which works ok.