I have a Toshiba Satellite, Windows 10. I turned on my computer one day and the x and ctrl keys no longer worked on the physical keyboard. They work on the touchscreen, and a USB keyboard. Everything else is fine. My drivers are all up to date. Judging by when the problem started, it does not appear to be related to a Windows update. I have tried to uninstall the keyboard driver but it does not appear to work; after the warning message, the "restart your computer" message pops up immediately. I restart, and the problem is not fixed. I have tried blowing air in case there's crud in there, but that does not appear to be the problem--and the keys are not adjacent. I am at a loss. Thoughts?