Maybe this is much simpler than i think: i am testing a SCCM deployment on a HP Compaq machine. I had problems with some drivers, so i had to repeat the installation multiple times in one day. After every deployment, there is a new entry named "Windows Boot Manager" in the Boot Device Selection. I am not able to remove them - is there a way to clean this without resetting Bios to default values?
What i tried so far is cleaning the disk with Diskpart, which did not change anything.