Windows 10: problem with dll file from Qustodio

I frequently have problems with Roblox. Most recently I can't open the app, despite uninstalling it, clearing the registry of all related files, and reinstalling a fresh download. The error message I get now identifies this dll file, which is from Qustodio. This app is installed on my laptop as a parental control, which I hate, but whatever. We have uninstalled Qustodio and removed all these files in the registry, too. I cannot find this dll on my computer, even in the Recycle Bin, and the only program this affects is Roblox. I do not have a blue screen of death, and everything else work

:)

 

DLL Missing

The problem is, that the required DLL is not actually even listed there.
There are just dozens of download adware links from the top to the bottom.

 

.DLL file

Hi Jerry,

Specific programs use DLL files to function properly in a Windows environment. If the DLL file gets misplaced, deleted, or corrupted, the error "____.dll is missing" appears. We'd like to learn more about your concern so that we could provide
the proper resolution. We just have a few questions for you:

• Which build version of Windows 10 is on your computer? To check, click
  Start, type winver, and press Enter. For example, 14393.1066.
• Did you make any changes to your computer before this started happening, like installing or uninstalling a program?
• What troubleshooting steps have you done so far?

As an initial recommendation, we suggest that you disable your Startup programs to isolate the cause of the error. To do this, follow these steps:

• Right-click the taskbar and select Task Manager.
• Click More details.
• Go to the Startup tab.
• Right-click every listed program and choose Disable.
• Restart your computer and check if the issue persists.
  
• If the error disappears, enable one of the programs and restart your computer to check if the error reappears; this is to pinpoint exactly which program is causing the error. Do this for all Startup programs until you find the cause.
• Once you've found the program that's causing the error, you can then try uninstalling and reinstalling it.

We'll wait for your response and the results of the troubleshooting.

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Windows 10 DLL Files

I already done that both didn't find any errors, also when i do Dism /Online /Cleanup-Image /RestoreHealth it does not work just sit there with blank screen, tried waiting but nothing is happening (idk whether it should happen i saw some pictures there should
be something when i run command...) I tried to install some dll files manually some with dll files fixer but all of programs got error 0xc000007b, then i tried deleting some dll's and then some programs were working but the others were now requesting thoose
files.

UPDATE: Dism /Online /Cleanup-Image /RestoreHealth now works but it didn't fix all the problems some programs still request dll files or show error 0xc000007b. Ok Dism /online /Cleanup-Image /RestoreHealth partially helped i installed some manually and all
of programs work well except Epic Games Launcher(Unrela Engine 4) which i didn't made to fix, thanks for your help!