In some cases, authui.dll errors could indicate a registry problem, a malware issue like a virus infection, or even a hardware failure.
Authui.dll Errors
There are several ways that authui.dll error messages might be phrased depending on the cause of the problem. Here are some common authui.dll errors:
Authui.dll Not FoundThe file authui.dll is missing.This application failed to start because authui.dll was not found. Re-installing the application may fix this problem.Cannot find [PATH]\authui.dllCannot start [APPLICATION]. A required component is missing: authui.dll. Please install [APPLICATION] again.C:\Windows\system32\authui.dll is either not designed to run on Windows or it contains an error.
Authui.dll error messages might appear while using or installing certain programs, when Windows starts or shuts down, or maybe even during a Windows installation. Noting at what point your authui.dll error shows up is an important piece of information that will be helpful during troubleshooting.
How to Fix Authui.dll Errors
Need More Help?
If you’re not interested in fixing this problem yourself, see How Do I Get My Computer Fixed? for a full list of your support options, plus help with everything along the way like figuring out repair costs, getting your files off, choosing a repair service, and a whole lot more. If you suspect that you’ve accidentally deleted authui.dll but you’ve already emptied the Recycle Bin, you may be able to recover authui.dll with a free file recovery program. It’s even possible that the authui.dll error you’re seeing is related to a hostile program that’s masquerading as the file. This step is most useful for replacing DLL files that are not supplied by Microsoft but it could help with your authui.dll problem if this program also provides a copy of the file and the previous troubleshooting ideas weren’t successful. The authui.dll file may or may not be related to video cards—this was just an example. The key here is to pay very close attention to the context of the error and troubleshoot accordingly. We rarely recommend the use of registry cleaners. They’re included here just in case it turns out to be helpful, in which case you could avoid the more difficult testing and last-resort options below. If the hardware fails any of your tests, replace the memory or replace the hard drive as soon as possible. A clean install of Windows is a fresh start on the software-side of the troubleshooting. So, unfortunately, if that didn’t work, your DLL problem must be hardware related.
