_ at the top left but I stopped getting that. have tried restarting multiple times. have been trying to reinstall, but I can't as when I try to install to the disk, it said it can't since "You selected disk sdb (my SSD), which contains devices that also use unselected disk sda. You must select or deselect these disks as a set." Is the reason it was a black screen after boot because I confused it by installing to two disks on accident(I've never used this kind of installer)? or is it unrelated and something else needs to be done