Hello everyone, First of all, thanks for all the informations gathered here. I've spent a bit of time here and learnt a lot. Hopefully will keep doing it. I've been given a batch of ~10 HP probooks 650 G1, which are all locked by Admin password, with no option to boot on USB/CD, nor can i modify any settings. These laptops will be sent to trash very soon... I got myself a Raspberry, ch341a programmer, managed to dump the file. Also located $VSS but i'm *very* unsure about how many Bytes i have to clean. How can i be sure about this ? I tried searching the internet, but i'm in a dead end. Any help would be appreciated, thanks.