I have a HP PROBOOK 450 G4 that i have been using for 8 months with windows 10 pro 64 bit . To day it prompted me for an update, it was a feature update, mid way it crashed with an error message and then it automatically started to re install the previous version when it restarted it didn't boot to the os. Only the hp logo appears on screen. The fans, keyboard and cd rom are working correctly. I inserted an installation disc but couldn't access the bios as it can't boot. Is it a CMOS failure or something else!
Any help would be appreciated?