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  1.    30 Mar 2017 #11
    Join Date : Aug 2016
    S/E England
    Posts : 4,476
    10 Home x64 (1709) (10 Pro on 2nd pc)

    It appears the profile for your Administrator account may be corrupt. At the black screen after log in Ctrl-Alt-Del (as you have found) brings up a blue screen with options to sign out, switch accounts, start Task Manager and so on. If you sign out and sign back in with your normal account this will become the one that you get signed into at boot again.

    As we now know the Administrator is enabled and has a blank password, you may be able to use this to let you run a Command Prompt (Admin) in your normal account. You should see the UAC prompt when you try to open one. It asks for an account and password to proceed. By default it offers the first admin account it finds. If it doesn't offer Administrator, click 'more choices'.

    From a Command Prompt (Admin) you may be able to make your account an administrator again. Option Four in @Brink's tutorial.
    Change Account Type in Windows 10
      My ComputersSystem Spec
  2.    30 Mar 2017 #12
    Join Date : Mar 2017
    Posts : 51
    Windows 10 Pro 64-bit
    Thread Starter

    Quote Originally Posted by Bree View Post
    It appears the profile for your Administrator account may be corrupt.

    As we now know the Administrator is enabled and has a blank password, you may be able to use this to let you run a Command Prompt (Admin) in your normal account.
    -- I hope not but I feel you may be correct about it being corrupt.

    -- Sadly it does not appear that the password is blank. I must have entered a password quite some time ago
    When I leave the password field blank and click "Yes" for it proceed, it won't accept it.

    I would have replied sooner but I missed your post being on the second page.
      My ComputerSystem Spec
  3.    30 Mar 2017 #13
    Join Date : Aug 2016
    S/E England
    Posts : 4,476
    10 Home x64 (1709) (10 Pro on 2nd pc)

    Quote Originally Posted by Razz View Post
    I would have replied sooner but I missed your post being on the second page.
    Understandable. You can subscribe to a thread and get a notification of new replies. You should choose 'Through my control panel only' (unless you really wan your email inbox to get a flood of notifications ). Notifications appear at the top of the page when you next read a page at TenForums, just like the one you got for this mention: @Razz.

    You need to reset thst Administrator password to get any further. I'll have to think about this, so subscribe and wait for me to get back to you...


    What was I thinking. That's how another forum I frequent works. Here new posts on subscribed threads are listed in you Control Panel, clikck 'Settings', last but one at the top of the page.
    Last edited by Bree; 31 Mar 2017 at 11:40. Reason: correction
      My ComputersSystem Spec
  4.    30 Mar 2017 #14
    Join Date : Aug 2016
    S/E England
    Posts : 4,476
    10 Home x64 (1709) (10 Pro on 2nd pc)

    OK, I've had one thought.

    I don't know what's wrong with your Administrator account. It looks like its desktop is broken. The fact that you can use Ctrl-Alt-Del to log out suggests you managed to log in OK with the blank password. So why doesn't it accept it at the UAC prompt in your normal account? That's a puzzle that @Brink may be able to shed some light on.

    However, you may be able to use the 'broken' log in to Administrator as it is. Try logging in as Administrator. At the black screen, use Ctrl-Alt-Del again. This time select Task Manager. From Task Manager, on the 'File' tab choose 'Run new task' and run netplwiz. This can be used to reset the password for your other account. This is Option Two in this tutorial.

    Reset Password of User Account in Windows 10

    Select you other account in the list in netplwiz and click the Properties button. On the 'Group Membership' tab you can make it an administrator. That's Option Three in this tutorial.

    Change Account Type in Windows 10
      My ComputersSystem Spec
  5.    30 Mar 2017 #15
    Join Date : Oct 2013
    Posts : 25,170
    64-bit Windows 10 Pro build 17040

    I'm not sure what else to suggest either than what you already have just posted Bree.

    If that doesn't work, then it may be best to backup anything he doesn't want to lose, then clean install.
      My ComputersSystem Spec
  6.    30 Mar 2017 #16
    Join Date : Aug 2016
    S/E England
    Posts : 4,476
    10 Home x64 (1709) (10 Pro on 2nd pc)

    Quote Originally Posted by Brink View Post
    If that doesn't work, then it may be best to backup anything he doesn't want to lose, then clean install.
    Thanks @Brink, I was afraid that might be the response. It'd odd that Administrator appears to accept a blank password at login, but not at the UAC. Maybe once the original account is an admin again they could try resetting the Administrator password to a blank password and see if it makes a difference.

    For peace of mind though, a clean install would be my choice too - once everything is well backed up, of course.
      My ComputersSystem Spec
  7.    31 Mar 2017 #17
    Join Date : Mar 2017
    Posts : 51
    Windows 10 Pro 64-bit
    Thread Starter

    Click image for larger version. 

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    YAY! Thanks to Bree's prompt help and guidance, my problem has been solved!

    I'll try and explain how the problem was resolved:

    When I went into the task manager, after clicking on the Administrator account from the login screen, and then running "netplwiz", I was able to change the Administrator password. But within my account, stuff still didn't work for me. I tried going into the Administrator account and could tell it accepted my new password because the little "welcome" message appeared under the password field (this hasn't happened before). However, as before, nothing happened for about a minute. Then a desktop appeared very briefly but it only showed the recycle bin and my Last Pass vault. After approx. 5 seconds it vanished and a black screen appeared. I waited for several minutes but nothing happened.

    I then repeated the procedure to run "netplwiz" and this time I highlighted my account and following your instructions, on the next page selected "Group Membership" and assigned Administrator rights to my account.

    I cannot thank you enough for your time and all your help!
      My ComputerSystem Spec
  8.    31 Mar 2017 #18
    Join Date : Mar 2017
    Posts : 51
    Windows 10 Pro 64-bit
    Thread Starter

    So it appears that the hidden Administrator account, which is now enabled (thus appearing as an option on the login screen) is just not working. Who knows why, perhaps it's corrupted somehow.

    So again as per your comment earlier, I assume the smart thing to do is create another account and assign administrator rights to it.

    Is this correct? Also, will the new account naturally adopt all from my account?
      My ComputerSystem Spec
  9.    31 Mar 2017 #19
    Join Date : Aug 2016
    S/E England
    Posts : 4,476
    10 Home x64 (1709) (10 Pro on 2nd pc)

    Quote Originally Posted by Razz View Post
    So it appears that the hidden Administrator account, which is now enabled (thus appearing as an option on the login screen) is just not working. Who knows why, perhaps it's corrupted somehow.

    So again as per your comment earlier, I assume the smart thing to do is create another account and assign administrator rights to it.

    Is this correct?
    You are in and have admin rights again, that's good. Unfortunately you cannot just make a replacement for Administrator. These special built-in accounts (Guest is another) are an integral part of the operating system and can neither be deleted or created. It's a good idea to have a second local administrator account, but just as an alternative way in should you loose the password again.

    Now would be time to take stock, make sure you have backups of all the documents you need to keep, and that you have the install media and software keys for anything you installed. There's no rush now that you have an apparently working system again. The problem with Administrator will still be lurking in the background, though. We cannot say if it's going to cause trouble down the line.

    When you are happy that you have everything you need to do a clean install and rebuild your PC if necessary, then we can see if it's possible to repair. I suspect either of your Aomei or Macrium images are too recent to be of help. I'd leave Administrator enabled for now and try, in this order:

    Check system integrity with sfc /scannow in an elevated command prompt. Option Three here:
    Run SFC Command in Windows 10
    (note: you may need to run this several times until it fixes all it can)

    Run the "DISM /Cleanup-Image" Tool in an elevated Command Prompt.
    Use DISM to Repair Windows 10 Image

    do a repair install of Windows 10 by performing an in-place upgrade without losing anything.
    Repair Install Windows 10 with an In-place Upgrade

    After each step, try logging in as Administrator and see if anything has changed. If Administrator has a working desktop after trying these, then set a blank password and disable it, then it's there for next time you may need it.

    If not go to the next step. I suspect none of them will work, but it's worth trying just in case. The ultimate step is to do a clean install, wiping everything off the PC and starting form a clean slate, I'm afraid.

    As I said, there's no rush now you have a useable system. You may decide to risk it and not that the ultimate 'Clean Install' step. It's your call, but make sure you keep everything backed up, just in case.
      My ComputersSystem Spec
  10.    31 Mar 2017 #20
    Join Date : Mar 2017
    Posts : 51
    Windows 10 Pro 64-bit
    Thread Starter

    I know our documents, pictures etc. are safe.

    Besides my old Dell laptop (which you just helped me with) that I bought second-hand a couple of years ago, my wife and I each have a Desktop PC and my wife has a new Acer laptop. Any important stuff we have is stored on all 4 computers as well as a USB drive.

    I will probably do the steps above but will likely not take the "ultimate 'Clean Install' step", as you call it.

    If I do decide to do a clean install, should I do it via the Advanced mode that you access via shutting down and restarting several times until the pop-up?
    Last edited by Razz; 31 Mar 2017 at 16:14.
      My ComputerSystem Spec

 
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