Thank you very much for the prompt reply.
I updated my PC through Microsoft Windows Update last year. I have set Windows Update on auto, allowing my computer to automatically install updates.
Is there any guarantee that I can downgrade my OS to Windows 7 64 bit without purchasing a new activation key from Microsoft?
If I recover my PC to default settings through the provided VAIO disc, will I be downgraded back to Win. 7?
Many Thanks!