I am running Lubuntu 12.10 and performed an upgrade this morning, and since it's rebooted, the only thing that loads is Memtest. I have no choice of what loads and can't exit from Memtest.
I am new at all of this, and haven't dealt with this before. Is there a keyboard shortcut I can use to bring up the bootloader? I have spent 40 minutes trying to find some info on what to do but am lost.
Thanks in advance