Has anyone installed the Microsoft keyboard and mouse drivers today? I have Win 8.1 after starting up the computer today, I see I have one new security update, and two optional. Neither the keyboard, or either of my two mice are Microsoft. I am not sure whether to install them or not. The security update keeps saying preparing to install, but it is taking much much longer than normal to install. I decided to do it first, then ask about these other two. I don't want to mess up my keyboard and mouse with an update not meant for their brand. Thoughts please?