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Is all you get is the error screen now? No more Windows 10 login?
OK understood. When you turn on the computer, please tap the F12 key to enter the BIOS.
Press the right button to move to Startup, then change CSM to enable if it is not so already.
Then change the Boot Priority from Legacy first, to UEFI first
Once this is done, press F10. This will save the BIOS when you confirm it by pushing yes. Restart your computer after saving and let me know what happens.
OK do you have only*****installed?
OK, are you attempting to boot off the SSD? You may want to go back into the BIOS, or hit an F key to specifically select which HD to boot off of.
Windows 10 uses UEFI. It is an odd situation as you were not the one who installed Windows 10, so at this point it could be on any of the drives I would believe?
Windows 10 is moving towards UEFI I should restate, it depends how it is configured. I will see if there's a button to select your boot device for that machine.
You can go back into the BIOS and see where it is booting from? Also ensure any USB/DVD drives are empty/disconnected so they do not interfere with the boot process.
OK can you verify it is booting off the SSD? It should show what devices it will boot off of and their order. A problem is we don't know how Windows 10 got on there. Are we even sure Windows 10 was installed? The NTLDR is usually associated with a corrupt master boot record. We could try to fix it. Or, you may still have a recovery partition we can look into, to restore the older version of Windows?
It won't hurt anything changing the order of these. The problem is however Windows 10 got installed, they would have had to pick the device to install on. Without you being the one who actually installed it, we have no way to know where it installed Windows 10. But switching these around may allow us to find it.
That may be a possibility too as it doesn't seem it is listed. Can you check in the BIOS and instead of looking at the startup devices, look at the actual installed devices? Are you using a RAID controller or something to allow this many devices, or are some of the devices not SATA (EIDE?)
Are you able to see a list of all your connected devices? Not in the startup menu, but it is usually in the first page. These are settings that cannot change, as they are a display of what is currently installed. We want to make sure your SSD is still showing up.
Unfortunately it is more likely it died than has been disconnected. You can double check it, and also swap it on the cable to another cable in case that is the problem (the cable)
That is fine. When you have time please check the drive and the cable. I hope I have led you in the correct direction with this problem, it does seem the SSD drive may have went bad at least from what we are seeing now. Let me know after you verify and if you need my help we can find a cost efficient replacement. If you have any other questions feel free to ask here. If you appreciated my assistance please rate me!