Kbfiltr.sys, help me computer people?

uming you can start your computer again, when you are logged on open task manager, ctrl+alt+delete, and click the processes tab. If kbfiltr.sys is a running process right click and select end process. If your PC crashes again then you can be pretty sure it is a windows system file therefore would be ok to ignore. Some antivirus programs are a little overzealous when it encounters something it doesn't recognise. Or as the guy above me said, install and run malwarebytes anti malware, it has helped me on numerous occasions.