Sony VAIO TR2A Notebook "change electric window switch seat" Questions

...regulating software was affected. If your computer began overheating out of the blue and no major changes were recently made, this is not likely to be the cause. Reinstalling the operating system

...change startup priority via the F12 button. Bootup then continues to a black screen which then says NO OPERATING SYSTEM FOUND. The system then hangs and will do nothing further. Hitting the enter ...