Question Win10 deletes itself after restarting conputer

[hkisthebest]

Hello,
As the title said, I reinstalled windows a few weeks back. I don't really shutdown my computer so I just leave it on when I go to sleep, today I woke up and open my monitor waking it up from sleep but it didn't respond, so I hold down the power button and reboot it, it went straight to BIOS, when I checked the boot priorities, my system wasn't up there. So I plugged in my win10 installing usb, went to the command prompt, selected the disk I used to have windows, list partition, it said there are no partitions on this disk, also the volume of my windows was gone.
Any reasons why win10 will delete its own partitions?
Thank you in advance.

 

[Phillip Corcoran]

Sounds like the OS hard drive may have died mate, not Windows deleting itself.

Either that or the hard drive power or SATA connections have come adrift, so check that first.

 

[britechguy]

Second of Mr. Corcoran's opinion. This sounds like a classic hard drive failure scenario.

Since you say you reinstalled Windows 10 a few weeks back that makes me presume you're keeping user data backups, which is a very good thing. You'll need to restore from those again once you get a replacement HDD or an SSD.