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Qt5core.dll missing - how to fix the Problem

  • Oct 29, 2025
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Some applications and games need the file Qt5core.dll. This is missing, the programs will not start. We will show you what you need to do to fix the Problem.

Qt5core.dll missing file to download and register

In most cases, you solve the Problem by removing the affected program from your System completely and then install the latest Version. This is not sufficient, proceed as follows:
  • The missing file Qt5core.dll you can here the correct Version for your operating system (32-/64-Bit) download.
  • You will have to copy the DLL file from the downloaded archive into the correct directory. You can use a 32-Bit Version of Windows, copy the file to: C:\Windows\System32. In the case of a 64-Bit Version, copy the appropriate file in addition to C:\Windows\Windows\SysWOW64.
  • Now, open the command prompt with administrator rights. You can use Windows 10, click with the right mouse button on the Start Button and select "command prompt (Administrator)".
  • Now enter the command "regsvr32 qt5core.dll" (without the quotation marks) and confirm it with Enter. Then the program should work error-free.
As you unnecessary DLL files to get rid of, we will show you in the next tip.

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