Problem with keyboard

the keyboard malfunction itself and need a replacement if you want to use another OS other than Ubuntu. Some keyboard malfunction for a reason, for you it is a board failure because of some reasons....

This is certainly a driver based issue. Just open device manager and view properties for your keyboard driver. If the "roll back driver" option is available, then it might be an update issue, and try this option. Otherwise, uninstall the keyboard driver and restart your system in windows. It may solve your issue. But, if it does not, you will have to search for the Windows compatible driver from the keyboard manufacturer's website. If the problem still persists, you may have to wait for a better answer to your question.