I can't adjust brightness with keyboard..why? I am using sony vaio laptop--model PCG-61411L.. Operating system : Window 7 32 bit
SOURCE: how to format sony vaio pcg-4 series
Boot from the "System Restore" CD-ROM.
One of the "setup" options for XP (or for Vista) is to "format" the entire disk-space, before continuing with the re-install.
SOURCE: sony vaio operating system not found when computer
You can try running the installation/recovery disc that came with the computer or the built-in recovery system (if it has one) to try and repair the windows installation. The problem is if the computer is saying that the operating system is not found then critical files got deleted from something like a virus or the hard disc drive has stopped working. You may have to do a format and re-install of the windows OS.
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