Windows 10: accidentally renamed file extensions in system32 folder, wont startup

Discus and support accidentally renamed file extensions in system32 folder, wont startup in Windows 10 Support to solve the problem; hello everyone, i ran a command that was suppose to rename every file extension in a folder to the jpg file, but forgot that the default folder was... Discussion in 'Windows 10 Support' started by tenhell, Dec 23, 2016.

  1. tenhell Win User

    accidentally renamed file extensions in system32 folder, wont startup


    hello everyone, i ran a command that was suppose to rename every file extension in a folder to the jpg file, but forgot that the default folder was system32 in cmd. I even ran CMD as admin, so it renamed quite a few. After restarting my computer obviously failed to start up. I tried windows repair but it couldnt fix it.

    Is there any way on getting access to the system32 folder on the windows 10 iso? so i can copy those files back?

    So example of the issue would be a file named dog.dll is now dog.jpg.


    Thanks in advance!

    :)
     
    tenhell, Dec 23, 2016
    #1
  2. tommylux Win User

    OSK popping up when software Run As Admin

    Been looking for a resolution for ages.. originally on win 7 and upgraded to wn10 and problem still Occurred. symptoms as per thread.. opens up when you run any admin tasks and on startup, even with the registry and settings set to disabled. Not in any startup
    folders or startup registry settings etc.. I decided to rename the osk.exe in the system32 folder and this seemed to do the trick for me.

    You need to change owner for the osk.exe and then add modify permissions to the file in order to rename to osk-disable.exe

    Couldn't see any event logs post rename
     
    tommylux, Dec 23, 2016
    #2
  3. Need to change download format from Word pad to .pdf

    If you know for sure it's a .PDF file type, all you need to do is rename the file from the existing file extension to .PDF. For this you need to disable "hide extensions for known file types" setting in Folder Options > View tab.

    Then right-click the file, click rename and change the extension to .PDF.
     
    Ramesh Srinivasan, Dec 23, 2016
    #3
  4. dalchina New Member

    accidentally renamed file extensions in system32 folder, wont startup

    Hi, if you know exactly what you've done, you can reverse that by not booting from Windows, but by booting using either
    a. a Win 10 install medium, and navigating to a command prompt and making the changes
    or
    b. Getting e.g. Kyhi's boot DVD/drive from the Software and Apps section here, booting from that, and in a familiar Windows environment make the changes you need.

    Alternatively you may be able to use System Restore if you have usable restore points, and running System Restore by booting from a Win 10 install medium and then starting System Restore.

    Note: we strongly and repeatedly recommend the use of disk imaging (e.g. Macrium Reflect (free) which lets you restore your PC to a previously working state without tech. help.
     
    dalchina, Dec 23, 2016
    #4
  5. tenhell Win User
    Does option B or something similar offer the following, which i feel would be easiest way to fix this:

    1. have access to what the original system32 folder would look like upon a fresh install, i only need the files in that folder, not the sub-folders or any contents in that. That way, i can just do a simple drag and drop style (copy and paste) to my drive and it should boot okay.
     
    tenhell, Dec 23, 2016
    #5
  6. dalchina New Member
    Hi, from what you posted it sounded as if you needed to rename files. If you are able to do that, and the system boots, fine, hopefully.

    If system restore works (launched from a bootable win 10 install medium) that would be ideal.
     
    dalchina, Apr 4, 2018
    #6
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accidentally renamed file extensions in system32 folder, wont startup

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