I have a Sony Vaio that is not working properly. It used to work properly but it would occasionally freeze and I would need to hard reset it by holding onto the power button for around 5 seconds. Yesterday, the computer froze again and I hard reset it. For some reason, it didn't show the regular boot menu asking me to start windows normally or go into safe mode. Instead it said Windows did not start successfully so select one of the options below. The options were Launch Startup Repair and Start Windows Normally. I selected Start Windows Normally but it didn't work and just went into black screen. I contacted Sony agent and they asked to reset BIOS. Once I reset the BIOS, instead of giving the options to start normally or go to repair, the computer just showed "Operating System Not Found" after the vaio logo. Then, I went into the BIOS to check if the hard disk is recognized. It said "Hard Disk Drive: None" and this meant that the hard disk wasn't being recognized. Today, the same issue was there and I went to the BIOS and reset it a couple of times. Suddenly, the next time I went to the BIOS, it said "Hard Disk Drive: 320GB" This meant that that hard disk was being recognized by the system. Then, when I booted the system, the VAIO logo appeared, and then the system went into a black screen. Around 2-3 minutes later, that same boot menu came that was here at first asking to launch startup repair or start windows normally. I once again tried doing start windows normally. It then went into a black screen again. The next time, the same thing happened and I chose startup repair. It went all the way to the cursor with Windows 7 background but nothing happened after that. The Hard Disk light has been glowing solid orange meaning that the hard disk has been working. How do I fix this. I didn't install any new hardware or software.
Please help me.
I will really appreciate it.