Resolve Windows 10 related issues for your HP computers or printers by HP Windows 10 Support Center
I have a Compaq Presario CQ57 and I was using it and it shut down. Then when I turned it on it said this.
Boot Device Not Found
Please install an operating system on your hard disk.
Hard Disk (3F0)
F2 System Diagnostics
It was just working fine a second ago. Please help!
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