I have a Lenovo yoga ultrabook. For some reason, the last few times I've used it, it thinks I'm holding the ctrl keys down. This is wreaking havoc. Every time I click somewhere in word document, text is selected and I can't de-select it. Sometimes other actions like opening up a secondary window is launched because the function uses the ctrl key. The keys are not stuck. They move up and down normally when I press them. How do I stop this please?
sounds like the keyboard needs to be replaced. Can you find an external USB keyboard that has PF keys and use it for testing. You could also test with the "on screen keyboard" just type osk in the start programs box.