I don't remember this happening in W7 or W8, but since I updated to 8.1 preview, now 8.1 rtm, when I type a long story or something (i am a keyboard watcher) ill look up when almost done typing and notice everything disappeared! so I dunno, is there a certain keystroke option or something I am activating to clear everything that didn't used to exist? I am at a loss, happens in multiple programs so not isolated to certain software. Keyboards fine, having spilled anything on it. Any help would be greatly appreciated, driving me nuts.
this maybe a stupid answer but you didn't say what kind ok keyboard (wireless usb or standard plugin) check and make sure the keyboard is making a good connection unplug it and plug it back in again if its wireless check the batteries, if you have another keyboard try it, usually that clears any keyboard problem ive had