Advent computer backup partition recovery

Hello, Try pushing alt and delete repeatedly - you will find this works - this will lead you to two options - 1.start windows normally and 2.launch start-up repair. click enter on start-up repair and you will be presented with the backup recovery partition software built into your advent computer / laptop. click reinstall windows. from here you can run a system restore without deleting your documents or a full recovery which will wipe / remove all data and restore your computer / laptop to its original state / operating system / configuration etc..