problem in operating system

[priya m]

i have installed windows 7 in my laptop.afterwards i have installed windows 8 without deleting windows 7.now windows 7 os is not working.pls suggest me a solution for thisproblem.i need windows 7 os and windows 8 os to work simultaneously

 

[MADVIU]

There's probably a Windows.old folder in your C: drive that has all of your Windows 7 files/programs/backups if you did not delete it. That's what would happen if you chose not to "delete" Windows 7 when installing Windows 8. Windows 7 is not bootable at this point.

Edit: It is possible to restore your Windows 7 from the Windows.old if you still have it. It is also possible to roll back and dual boot from Windows 7 and add on 8 with partitions.