Sony Vaio Windows 7 does not boot

Hi ,

I have a Sony Vaio S Series VPCSA35GG laptop that was working fine until it shutdown itself and since then it is unable to boot. It just displays a blinking cursor and does not boot or does not display any error messages.

I have also tried vaio care rescue option to copy my data and it also fails with mshta.exe error.

I have tried resetting BIOS to default values but did not help. I also don't have windows 7 disks.

Any help would be greatly appreciated