I have a Sony VAIO computer running Windows XP. My computer shut down the other day while I was in the middle of a project, and now it won't start up. It continually reboots, but never gets past the "Intel" logo just after the VAIO logo. It then either gets stuck with a black screen or keeps restarting over and over. I have attempted numerous times to get it into "safe" mode, but F8 only gives me boot driver options, and will not let me get into any kind of safe mode options. Does anyone have any advice?