Drive C: not found on reboot

  1.    #1

    Drive C: not found on reboot


    My PC seems to be developing a problem whereby I'm working on it and something happens that makes me feel I need to reboot. This could be anything but NOT games - I don't play games at all (unless you call doing jigsaws playing a game). Since I am retired I just use my PC for doing leisure things only.

    When I reboot, currently it mostly comes up OK but just lately it has started failing to find my OS C: drive SSD. I'm fairly certain this has nothing to do with the type or brand of SSD I am using which happens to be a Kingston 240GB (see also below re spare PC) which is set up for dual boot with Win7 and Win10. I've also done the obvious and checked the BIOS and no SSDs have been found including a Samsung 240GB SSD which contains just programs and data - NO OS. If I then switch off my PC and let the power supply settle for perhaps 15 seconds and then try again it runs up with no problem with both SSDs being found.

    In fact I have another 'spare' PC upstairs that has the same problem albeit currently with a Sandisk 240GB SSD This is also setup as a dual boot disk with Win10 and Win7. Prior to this I had the same problem with a Sandisk 120GB (also dual boot) and a Kingston 60GB and a another Sandisk 64GB (one OS per SSD). Although I've never chased this since it is a 'spare' PC that is not often used. Now I seem to be getting the same problem on my main PC though, I feel it's about time to get something sorted.

    Does anyone have any idea on what may be causing this as I'm at a complete loss at present? If anyone can help out it would be much appreciated.

    I should add that I upgraded Win10 about four weeks ago to the Creators Edition although I doubt this is anything to do with it as my 'spare' PC has been doing this since the first version of Win10 back in 2015 and if I remember rightly it also did it with Win7 before that!

    I hope I have described the problem adequately but if you have any questions please ask and I'll do my best to help.

      My ComputerSystem Spec

  2. philc43's Avatar
    Posts : 4,139
    64bit Win 10 Pro ver 1903 Build 18362.267 and W10 Insider Build 18362.10005 and 18950

    Hello Tracey,

    I wonder if your SSD needs to be set up in the BIOS with Hot Plug enabled? You will find this is the BIOS Advanced section under PCH Storage Configuration
      My ComputersSystem Spec

  3.    #3

    Is this a laptop or a desktop?
    When you can boot correctly, restart and boot into Setup (Bios) go to the Boot tab and make sure the SSD is moved to First Boot Device. Save and Exit.
    Check the cables on the SSD (ie) make sure the Data cable and Power plug are plugged in tight to the back of the SSD and the Data cable is plugged in tight to the motherboard.
    Try a different SATA cable, Try a different power plug from the PSU. Try a different SATA port on the motherboard.
      My ComputerSystem Spec

  4.    #4

    Hi folks

    Sorry I've not come back to you before now but I've been busy doing other things.As to the problem I have - I've set the SSD to hot pluggable but its made no difference. As for checking and/or changing cables I find it very difficult to believe that a cable which is OK one second goes bad the next second and then is OK again once I switch off my PC and then back on again, all in the space of no more than about five minutes and probably even less. As I have said, I do check the BIOS and ensure the C: drive is the second in the list (the first being my DVD drive). My PC has only just rebooted (about 5 minutes ago) and I will check my C: drive is first in the list again as I think when this happens it tends to get pushed to last in the list. However, I still remain to be convinced it is anything to do with cables.

    When it reboots on its own, I let it get to the point where it asks for a bootable disk then switch the PC off for about three seconds then switch on again. It then runs up as if nothing has ever happened so something is stopping the C: drive being found. Indeed is stopping either of my SSDs being found and I'm starting to wonder about the BIOS, i.e. whether I should update the BIOS that is, although I would prefer to leave that as is for the moment for obvious reasons. Snag is I really can't think what else it can be.

    I've just had another little problem which entailed rebooting and I can report that my PC reboooted perfectly. However, I took the opportunity to check the boot priorities in the BIOS and as suspected Drive C: was the last in the list whereas the data SSD (a Samsung 830) was second so just maybe I do have a problem with my Kingston SSD. I'll see if I can transfer everything to a Sandisk SSD and see if that makes any difference. Will get back to you later.
      My ComputerSystem Spec

  5.    #5

    I find it very difficult to believe that a cable which is OK one second goes bad the next second and then is OK again once I switch off my PC and then back on again, all in the space of no more than about five minutes and probably even less.
    It's not so far fetched, just replaced one here which was causing boot problems.
    A break in the wiring can make contact then not, just the vibration from a drive or fans could be enough to cause it to break and or reconnect, or the plugs on each end could not be making a tight connection, again vibration would be enough to cause the issue.
      My ComputersSystem Spec

  6.    #6

    But on two PCs managed by the same user?

    In fact I have another 'spare' PC upstairs that has the same problem albeit currently with a Sandisk 240GB SSD
    What could they have in common? Same mix of hardware? Something installed on both? It seems an improbable scenario..

    Is this just possibly restart vs boot from power up?
    What happens if you disable Fast startup?
    Click image for larger version. 

Name:	Snap 2017-05-25 at 14.19.21.jpg 
Views:	25 
Size:	52.3 KB 
ID:	136620
      My ComputersSystem Spec

  7.    #7

    Just a thought. A while back one of my users was having issues with his Crucial/Micron SSD. Slow performance, drive disconnecting, etc. He was adamant about needing a new laptop. A little research and found that there was a SSD firmware update that corrected such issues, which it did.

    So might want to check to see if there is a firmware update.
      My ComputerSystem Spec

  8.   My ComputersSystem Spec

  9.    #9

    Hi folks

    Thanks for the link dalchina but I've already sorted out how to check for and update the Kingston SSD firmware. As it happens there is no firmware update so this morning I've been occupied swapping my Kingston 240GB for a Sandisk Ultra II 240GB SSD from the PC upstairs. In fact thinking on it, I believe I was in error in what I said in my initial post. The PC upstairs has NOT been giving me the problems it used to since it has had the Sandisk 240GB fitted. I DO know that it was playing up in the way described when it had a Kingston SSDNow 60GB and a Sandisk 64GB installed, snag is I don't know which was the active one or which had what OS on it. Anyway I've now swapped the two 240GB drives over and we'll see what happens. I guess its just a case of wait and see now. Anyway, thanks for your responses folks, very much appreciated. I just hope this is the end of it.

      My ComputerSystem Spec


Related Threads
Trying to install a new Samsung 960 EVO M.2 1 Tb hard drive on my Dell Latitude E7470 laptop with Windows 10, but my Dell won't recognize the old drive in an external USB 3.0 case. I intended to boot up with the old drive in the USB case, then...
Internal hard disk drive not found in Drivers and Hardware
Hey all I have an Alienware X51 R3 and I was messing with my command prompt and accidentally changed what I believe is the path too boot my hard drive... In the command prompt I said  bcdedit /set {bootmgr} path \EFI\ I then reset my computer...
My Seagate external drive no longer shows up in File Explorer. I'm running Windows 10 for some time now, and it initially showed up until just recently. My local Tech Support guy says there is a known Windows 10 issue with external drives. Do you...
Hard drive errors won't fix on reboot in Drivers and Hardware
I am running build 9926, and got a maintenance error message yesterday, "Restart to repair hard drive errors (Important)". noting a need to restart the PC (as is common for NTFS repairs). However, upon restarting the computer, it just boots back...
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd
All times are GMT -5. The time now is 11:56.
Find Us