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If I try to move it there it asks for permission, I give it, it flashes, and nothing happends. I'm pretty sure if my pc were to restart I'd have a major problem. How can I move it? Should I remove my account so that Windows starts up automatically so that maybe I can use my PC again without a reinstall?

DavidPostill
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TheRedLemon
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1 Answers1

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First, you need to make sure that the authui.dll is actually the x64 version, otherwise it will end up in the SYSWOW64 folder when pasting it in the SYSTEM32 folder.

The Windows 10 x64 authui.dll should be around 518kb, not around 447kb. The version in SYSWOW64 will be 447kb and cannot be used for the system32 version.

It appears that you are somewhat stuck because you are in a loop.

You have a problem that requires elevation, but elevation does not work because of the problem that you're trying to fix.

This means that your current system cannot be fixed without aid from outside of windows.

But this can be fixed if you have an USB stick of at least 8 GB.

What you need to do is the following:

Download the Media Creation Tool and create a Windows 10 Installer for another PC, and write that to the USB stick.

This is to actually make it possible to repair your computer. Although it may be possible to reboot into the repair options, if that fails, you really do need this stick, so making the stick and using that is definitely the better approach here. Just to be on the safe side.

Reboot the computer and boot from the USB stick to get into the Windows Setup.

At the first screen that asks you to accept the EULA, don't click next, instead hit SHIFT+F10. This will open a command prompt as administrator and will allow you to copy the file that is missing/corrupted. Do not replace the file with a 32bit version, it won't work.

If you don't have that file, then instead run SFC /scannow from that command prompt to scan for any problems. It should detect that file being corrupt or wrong. If not, rename the file first (ren c:\windows\system32\authui.dll authui.dll.bak, then try the sfc /scannow again.

Once repaired, reboot the computer and see if the problem is fixed. If still not, you will most likely be better of with a reinstall. Backup your files, then use the USB stick to reinstall windows.

LPChip
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