Frequently Asked .DLL Questions

Everyone has questions about .DLL files which is why we put together these frequently asked .DLL questions.

  1. Where are the Windows System folders that I install .DLL files to?

    • These are the primary locations where .dll files can be installed.
      • 32 bit : C:\Windows\System32\ folder.
      • 64 bit : C:\Windows\SysWOW64\ folder.
  2. I dont know if my application is 32 bit or 64 bit. Where do I install the .dll?

    • You can install the .dll file in both system folders without any problems.
  3. The .DLL file already exists in my system folder. What do I do?

    • First try placing the .DLL file in the same folder where the programs .exe file is located. If this does not resolve the issue, create a backup of the .DLL file in the system folder and install a new copy.
  4. Can I delete .DLL files from my system folders?

    • No! Do not delete any .DLL files from the system folders for any reason! You should only install, restore or replace .DLL files but never delete them unless you are an IT professional and know what you are doing. Deleting .DLL files from your windows system can cause severe issues and can even lead to a system failure.
  5. Why should I search my PC for .DLL files?

    • You may already have the .dll file even though you are getting .dll errors. That's because the .dll file may have been moved or renamed by another application. Check to see if you already have the file on your computer by searching your PC for .dll files.
  6. I found filename.DL_ on my PC. What is this?

    • This is a compressed backup of the .dll file. Use software such as 7zip to extract the file and continue with installation.
  7. How do I know what .DLL files my application requires?

    • Keeping your applications up to date with the latest version will ensure you have the latest .dll files. If you have not yet done so, please read our 'How to fix missing .dll errors' article. This will explain the how to fix your .DLL errors without having to download and install .dll files.