missing operating system

today when i booted the system, it displayed error message

missing operating system

i have using computer since 1992, old days of windows 3.1

but never saw this message before in my whole life

i was able to re install win 7 in one hour

and the message dis appeared

As Britton said, run the hard drive diagnostics and then post the results. The error message indicates the boot process became corrupt at some point, leading to Windows not being able to boot.

Did you run any 'optimization' programs? Were or have you been infected with malware recently?

Britton30 said:

Another thought is if you had a dual boot setup with a Linux distro. It would leave behind the grub boot loader and cause this....I think.

Linux dual boots do generally mess with the MBR and Boot Manager, but once Windows actually messed up my Linux dual boot on the family computer

i ran microsoft scan disk and seagate tools
no problem deteced by these 2 tools

thanks guys for the help, i dont have time to go through each one of the suggestion

take care

It may not have been necessary to reinstall.

If it won't start here is everything that can be done for Troubleshooting Windows 7 Failure to Start leading up to if necessary rescuiing any files to Clean Reinstall - Factory OEM Windows 7 or Clean Install Windows 7