Question Mouse and Keyboard not working after new Motherboard and CPU instal


Dec 1, 2014
I finally decided to upgrade my pc. I upgraded my mobo to msi h370 gaming pro and cpu to i7-9700k. Once i was able to update the mobo bios with a different cpu i put the new one in and tried run it. The keyboard and mouse work in bios but not when i get to the start screen. I looked up a lot of similar issues but still wasnt sure. The start screen still has my background as before so I didn't think i needed to reinstall windows, also do not know where the original install disk is. I also do not own a PS/2 mouse/keyboard and do not know where i could find one quickly and easily. I just need help and I have exhausted myself on trying to get this upgrade to work. Thank you for any help provided.