I have a SONY VAIO VGN-NS230E and I installed Windows 7 32 Bit on this machine. It worked fine for a day and after installing Windows Update the system crashed and now never BOOT UP.
I have tried AVG rescue disk and also tried advance repair and safe mode options and also mounting a WIndows 7 Bootable CD but still cannot bootable. In debugging mode it gave me a Blue Screen saying Boot Drive UNMOUNTABLE.
The advance Boot freezes at CLASSPNP.SYS and never goes ahead.
I want to go into the advance BOOT options and and change BIOS settings using F8 so that I Can disable CPI APIC support but that is also not possible
Please give me some suggestions and help me get into the system.