I am using a Sony Vaio VPCEFE3E1E. Since this morning when my laptop randomly started playing up, everytime i reboot my computer i get the Vaio logo brielfy then a black screen and with the text 'Operating System Not Found'. Everytime i push a button this text just repeats itself. I havent changed anything on my computer recently and I have no viruses that i know of. This randomly happened today when i was watching a youtube video and it crashed. I also dont have any recovery discs!