If your computer can’t find an operating system to boot into, you might see a very simple error message on a black screen that says “Operating System Not Found.” This may be a shocking error message, but there’s no need to worry: your files probably aren’t gone.
Acer Aspire Operating System Not Found, Laptop Won't Go to Window
There are a few simple reasons why this could happen, and it is unlikely that your important data has been erased. Here are some of the causes for this error:
Follow these steps in order to try the simpler solutions first:
Restart your computer. The error may be a temporary glitch that will be resolved by restarting. If you don't see a normal restart option, use the Ctrl+Alt+Del method.
