I am having a problem with my zero key not working . Since it is happening on multiple keyboards I assume it has something to do with software. I have uninstalled keyboard drivers and reinstalled them to no avail. The weird thing is if I reset my computer so I have to use the windows login window the key works in the password window? If someone could help me I would really appreciate it. I have seen other people with the same problem online and they fixed it by using the function lock button on their laptops, the problem is I do not have this button because I am using desktop keyboards. I have two Corsair keyboards a K63 and a Strafe and also a old Razer keyboard. Thank you.