System DLL error on every log in.

Every time I log in on my Microsoft Surface Pro 6, I see the following error:

It says, "You are attempting to open a file of type 'System File' (.dll)".

The "OK" button is greyed out, and there is no way to find out what DLL file is being requested, or by what program. If I touch any part of the interface, even just clicking anywhere on the desktop, this dialog box disappears.

I did a system scan for viruses or malware, and the results came back that there was no malicious software found. Which doesn't mean there isn't malicious software, but so far it seems this might just be an error of some kind.

How do I diagnose and fix this problem? I have not seen any other problems, but I want to make sure this is not symptomatic of a deeper problem.

By the way, I tried contacting Microsoft Support, but the support chat function is currently not connecting to any people for some unknown reason.

***Moved from: Windows 10 / Performance & system failures***

Answer
Answer

In the Search field lower left, type:
CMD  Right click on CMD  Click Run as administrator
 Type in at the prompt OR Copy and Paste these one at a time : (Hit enter after
each)
 Dism /Online /Cleanup-Image /CheckHealth
 Dism /Online /Cleanup-Image /ScanHealth
 Dism /Online /Cleanup-Image /RestoreHealth

When this completes, run the  System File Checker utility: In the Cortana/Search field, type:
CMD

 Right click on CMD  Click Run as administrator
 At the Command Prompt, type:
sfc/scannow
 This checks for any integrity violations
 Restart your system

Barb - Windows and Devices for IT MVP
*Please click Yes below if your problem is resolved. This may help others with the same issue.*

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Last updated March 2, 2024 Views 2,687 Applies to: