I just borrowed a Core i3 , Ubuntu laptop from my father's friend (because it was not been used for a while by them) . I installed SBCL Software for learning . I installed Steam and downloaded CS:GO (I thoroughly checked the specs and when it asked for creating a new "Steam Library" folder , it said "it is read-only" . So I got no way and just clicked "Select" (Which automatically choose "Bin" or "Root" folder , I didn't remember much) . It downloaded and played for sometime. After sometime , when I rebooted laptop , it got struck in some Green Oks and commands . Waited for an hour , it didn't bring me to login . I am worried now . Help me !!! Thanks in advance , just let me know what to do .