Windows 10: Replaced CMOS battery Lost Win 10


  1. Posts : 4
    Windows 10 Pro 64bit
       11 Apr 2016 #1

    Replaced CMOS battery Lost Win 10


    I just replaced my CMOS battery. The system rebooted and all my Windows 10 files are gone, it's created a new drive N: but I couldn't restore from Command line and I have a semi useless Windows 8 in place. Help?
      My ComputerSystem Spec

  2.    11 Apr 2016 #2

    The only thing replacing the CMOS battery would do is change your boot settings to default in Bios. Without seeing a screenshot of disk management:
    Disk Management - How to Post a Screenshot of - Windows 10 Forums

    My guess is that you have two hard drives. You installed Windows 10 on a second hard drive. When you replaced your CMOS battery, the boot settings went back to default, which was to boot from the Windows 8 hard drive. You need to go back into BIOS settings and change the boot order to boot from the Windows 10 hard drive.
      My ComputerSystem Spec

  3.    11 Apr 2016 #3

    Replacing the battery isn't going to erase anything. Like he said, your boot order got changed. If you have installed Windows 8 after the fact though, your files could now be truly gone. Depending on how and where you installed Windows 8.
      My ComputerSystem Spec


  4. Posts : 4
    Windows 10 Pro 64bit
    Thread Starter
       18 Apr 2016 #4

    Thanks for your reply. My reason for replacing the CMOS battery was a system freeze, having scoured the Google world this appeared to be the remedy. I had installed a Crucial SSD. In the process of examining Disk Management I found that whilst the new Drive(Disk 0) had a System Reserved Partition, the next partition was indicated as the boot partition but did not recognise the SSD when I reset the boot order in BIOS.
    Since then I have done a Clean Install of Windows 10 from the original .iso disk. Now the system continually freezes and crashes. It's frustrating as I am trying to use Command (Admin) but I have been unable to complete any software changes because it never completes the download/installation sequence.

    It's an Asus mobo, I have manually checked, the RAM, (removed and reseated) the Graphics Card (Nvidia) and updated all Drivers.

    Not quite suicidal but thinking of the Fitter's friend (Hammer)QUOTE=NavyLCDR;632819]The only thing replacing the CMOS battery would do is change your boot settings to default in Bios. Without seeing a screenshot of disk management:
    Disk Management - How to Post a Screenshot of - Windows 10 Forums

    My guess is that you have two hard drives. You installed Windows 10 on a second hard drive. When you replaced your CMOS battery, the boot settings went back to default, which was to boot from the Windows 8 hard drive. You need to go back into BIOS settings and change the boot order to boot from the Windows 10 hard drive.[/QUOTE]
      My ComputerSystem Spec

  5.    18 Apr 2016 #5

    I think you need to post a screen shot of your expanded disk management screen, if possible. I'm not exactly understanding what you did and where your at now?
      My ComputerSystem Spec


  6. Posts : 1,643
    Microsoft Windows 10 Home
       18 Apr 2016 #6

    alphanumeric said: View Post
    I think you need to post a screen shot of your expanded disk management screen, if possible. I'm not exactly understanding what you did and where your at now?
    I tried to read the post 4 a few times .... it appears that Jonty45 has done a clean reinstall after his first post; and now he is experiencing system freezes and crashes. But my understanding might be incorrect.
    Jonty45 said: View Post
    Thanks for your reply. My reason for replacing the CMOS battery was a system freeze, having scoured the Google world this appeared to be the remedy. I had installed a Crucial SSD. In the process of examining Disk Management I found that whilst the new Drive(Disk 0) had a System Reserved Partition, the next partition was indicated as the boot partition but did not recognise the SSD when I reset the boot order in BIOS.

    Since then I have done a Clean Install of Windows 10 from the original .iso disk. Now the system continually freezes and crashes. It's frustrating as I am trying to use Command (Admin) but I have been unable to complete any software changes because it never completes the download/installation sequence.
    Hi @Jonty45. Are you experiencing application crashes, or random shutdowns or BSODs?
    If you want, you may post a log following the Blue Screen of Death (BSOD) Posting Instructions in your reply post. The files help to determine the root cause of crashes.
      My ComputerSystem Spec


  7. Posts : 4
    Windows 10 Pro 64bit
    Thread Starter
       18 Apr 2016 #7

    Both, the BSOD's have been analysed by Whocrashed utility. Most refer to software issues with the kernel/software. The freeze\crashes are still occurring
    Arc said: View Post
    I tried to read the post 4 a few times .... it appears that Jonty45 has done a clean reinstall after his first post; and now he is experiencing system freezes and crashes. But my understanding might be incorrect.

    Hi @Jonty45. Are you experiencing application crashes, or random shutdowns or BSODs?
    If you want, you may post a log following the Blue Screen of Death (BSOD) Posting Instructions in your reply post. The files help to determine the root cause of crashes.
      My ComputerSystem Spec


  • Posts : 1,643
    Microsoft Windows 10 Home
       18 Apr 2016 #8

    In that case you are suggested to follow post #6.
      My ComputerSystem Spec


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