Error code 0xc0000098

[Grai]

Is it possible that ubuntu itself got installed on my computer...
Bcoz last night i just left my pc on...but locked(windows+L) and the network adapter also disabled from contrl panel. But when I checked my pc today morning, I found my system running ubuntu...and not able to access any of the HDD (there are 3 with one windows installed on, i have removed the other two)...then I restarted it...It just boots up with a black screen with flashing underscore...
So now I thought of formatting it using a bootable usd...but it doesn't show the HDD the one on which windows was installed earlier...after a few trials it started showing the error code
0xc0000098 but when i check sata devices in bios it shows up there...

Please help and how can i check if my other two HDDs are safe with the data or not...

 

[hang-the-9]

Booting to a black screen with an underscore is not "running ubuntu" that just means that the system can't find the boot drive.

You are saying that someone went into your room at night, and installed a Linux distro on your computer? What exactly happens when you turn on the computer?