Help!!! Operating System!

[SweetEssence]

When I turn my PC on....theres a black screen and it says...OPERATING SYSTEM NOT FOUND ON ANY DEVICES. What does that mean and can it be fixed!!

 

[Nodsu]

It means your computer cannot boot from the hard drive or anywhere else.

Depending on what you did to break it it may be fixed. It would help if you told us when and how the problem started.

 

[tdeg]

May need to reinstall your operating system.

A few things could cause this.

1) You had a nasty virus and it deleted your os or badly messed it up.
2) Your harddrive is shot.
3) Your motherboard is shot.
4) You did an upgrade of the operating system and it didn't work well.

What operating sytem were you using? Post some details and you will get a more detailed answer.