F secure it appears stopped opening after an update" HP Developments LP System". dont know what this is, but it happened all ok till this event ,any ideas why F seure not working. Dont know how to erase update or go back before update
What you have described appears to be a system update from HP, so nothing actually to do with F-Secure.
Have you rebooted your machine since the update? If not, try that, and come back to us if it doesn't help. We will need some more details, such as, confirmation of the F-Secure product, and the version of Windows you are using.