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Windows 7: Issues with replacing System32's authui.dll, needing help to fix it.

04 Jun 2015   #1

Windows 7 Home Premium 64bit.
Issues with replacing System32's authui.dll, needing help to fix it.

I apologize in advance if I am posting this problem in the wrong area, though I am in a bit of a panic and require assistance very badly with some involving System32 .dll's. To explain how I got into this issue, I was trying to follow a tutorial on how to remove the profile image from the logon screen of Windows 7 (with all working well until just now) and recently hit a large bump in the road. (in case my explanation is not exactly understandable since I might say something jumbled or confusing, apologies on that, here is the tutorial I was following. windows 7 - How to remove the User picture from Login and Lock screen? - Super User ) On the tutorial it gave two options one for people to edit the authui.dll themselves to receive what they wanted, and download a pre-edited authui.dll for those not confident enough to edit the registry. I of course chose the latter. All was going well, I changed the ownership of the original authui.dll and make a copy of it onto my desktop just in case, then changed the original to a .bak like the tutorial said, his is where the issue arose. I dragged and dropped the new Authui.dll into System32, it flashed saying I needed admin confirmation to do so, hit the button with the blue and yellow shield, and after the final flash nothing happened. I cannot put the replacement into System32, so now I have a copy on my desktop, a replacement ready to drag, and an authui.dll.bak inside System32 WITHOUT any actual authui.dll. I'm no mastermind of computers, but I think I know enough here to believe that if my computer were to restart right now, I am essentially royally screwed. This is why I need assistance, I need to know how I can somehow put the new authui.dll into System32, or at least know how to turn the authui.dll.bak into a .dll again, because I can't even do that, it says "Can't access control editor. A device attached to this system is not functioning" so I need to know if I can fix this or if I have to reinstall Windows at this point. I am hoping someone can help me out here somehow. (I apologize if I typed more than needed, I am just really desperate for an answer right now)

My System SpecsSystem Spec
15 Jun 2015   #2

Win 7 64 bit

I have exactly the same problem, I think microsoft updated this a while ago. I had already removed my profile pic on the logon screen with the exact same method. Today I tried it several times and I ended up with restoring my windows via the windows cd. Seems like editing the authui.dll is no option anymore. It is still working on my Laptop though, very strange.
I also tried to move files by stopping the explorer.exe via taskmanager, and coorinate with winrar.exe. didn't help either. Also register and unrigister the .dll via cmd did not help.
My System SpecsSystem Spec

 Issues with replacing System32's authui.dll, needing help to fix it.

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