Disk Management has a "disk 0" which is "not initialized" and it can't initialize it.
Last night while websurfing I suddenly got a white screen of death (never happened) before, I turned the computer off and on and windows (10) wouldn't load, the the little thing kept circling. After a couple more resets it (and unplugging USB devices as recommenced when I googled "windows not starting) it started some automatic repair thing, I left, when I came back it was booted up and seemed fine. But later I noticed 2 of the 4 hard drives it has no longer appeared, certain files that were on them are listed in "recent files" and "frequent folders" but not accessible. Of the missing drives "D" is in frequent folders, clicking on it does nothing and the icon for it has a question mark. They do not appear in "disk management" either.
Running a system restore didn't work, it said system restore failed, I got some program called Easeus data recovery but they want 70 bucks and I'm not sure that would help either. It detects 3 hard drives, the 2 that remain and one with no letter only an asterisk and a minus symbol over the icon of the drive. It lists 450 MB of which 70.52, I don't recall if this matches either of the missing drives, clicking on it shows me things called "lostpartition1" and "lostpartition2".
In "disk management" in addition to the 2 remaining drives it lists 2 other things called (disk 2 partition 3) which it says has 450 MB of which 100% is free which it calls a healthy "recovery partition" and something called "System Reserved' which it calls a "Healthy (system, active, primary partition) with 90 megabites free out of 350. These latter 2 along with the primary drive "C" are said to be on "disk 2" while "Disk 1" consists only of the other remaining drive, "F".
Missing drive "D" was the most empty so it's where I've been putting most new files.
As you can tell I barely know this computer from my backside, my brother built it himself and used it before he gave it to me a year ago. I have no clue what to do or how to physically look at the computer's guts to see if something is wrong there with the disks (they are disks yes?). Obviously I'd like the files I lost back or at least have the storage space back.
I'm using Windows 10 Version 1709 (OS Build 16299.192) about a month ago it got the latest "creators update" which had the effect of causing the PC to take longer to shut down or restart and caused minor unresolved video problems.