Download CCleaner here Some users have stated that a userdata.dll error message pops up whenever they start Windows or when trying to manually open a specific program. The userdata.dll error message states: This application failed to start because userdata.dll was not found. Reinstalling the application may fix this problem. Another related error message you can encounter is: The program can’t start because userdata.dll is missing from your computer. Try reinstalling the program to fix this problem. This error message usually pops up when the userdata.dll is either missing or corrupted in some way. Consequently, software that needs the user data file can’t access it. The same error message can pop up for other DLL files, and the fixes for it are pretty similar. Keep reading to learn how to fix the userdata.dll is missing error message in Windows 10.

How do I fix userdata.dll problems in Windows 10?

1. Use a dedicated DLL fixer

There are plenty of third-party programs out there that promise to fix or replace missing or broken DLLs, and most of them stay true to their word. However, if you are to choose just one, then there’s no way you can go wrong with the suggested tool below.

2. Run a System File Checker scan

Note: If a virus or malware has corrupted userdata DLL, the System File Checker can also repair it. This built-in solution will scan system files and replace any corrupted ones with a cached copy. 

3. Update device drivers

Some users have stated that updating hardware drivers fixed the userdata.dll is missing error. So updating outdated or corrupted drivers is a potential resolution for the userdata.dll error. However, it’s hard to tell what drivers you’ll need to update. Your best bet is to add software to Windows 10 that will scan your drivers. DriverFix is a tool that you can update AMD, Nvidia, and Intel drivers with, among others. You can download the tool for free to your Windows device by visiting the website indicated below. Upon launch, the software automatically scans drivers and lists any that need updating. Select each indicated driver in turn and click the Update button to get the latest version compatible with your system.

4. Scan the registry with CCleaner

Note: Registry problems are often the source of DLL file errors. It might be the case that there are invalid registry entries for userdata.dll. You can scan and repair the registry with third-party tools like CCleaner. 

5. Remove programs from the Windows Startup

Note: Some users have said that they fixed the issue by removing the Password Manager Pro and Fingerprint Reader programs. Thus, it might be the case that a startup program generates the error message. So removing software from the system startup is another potential fix for the userdata.dll error.

6. Rollback Windows with System Restore

Note: System Restore can come in handy for fixing corrupted DLL files. With this utility, you can restore Windows 10 to an earlier point in time, which can fix corrupted system files. in this case, you should select a restore point that will restore Windows to a date when the DLL error message did not pop up on your laptop or desktop.

7. Reinstall the software

Note: The userdata.dll is missing error message states, Reinstalling the application may fix this problem. So that’s one hint about the specific app which might cause the error. 

8. Get a new userdata.dll file

9. Add DLL Fixer software to Windows

There are numerous DLL fixer software for Windows that fix DLL errors. DLL Suite, DLL Tool, DLL Files Fixer, and Free DLL Fixer are some of the utilities that scan for and repair corrupted DLL files. They also include databases that you can get replacement DLL files from. As such, those utilities might come in handy for fixing the userdata.dll is missing error. You can try out an unregistered version of DLL Suite by clicking the Start Download button on this page. So these are a few resolutions that should fix the userdata.dll is missing error in Windows 10. Note that some of the above resolutions might also fix missing DLL error messages for other files.

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