How to Fix Dciman32.dll

This article provides critical piece of information that can be helpful to diagnose following error messages:

  • This application failed to start because dciman32.dll was not found. Re-installing the application may fix this problem.
  • Cannot start Microsoft© Windows© Operating System. A required component is missing: dciman32.dll. Please install Microsoft® Windows® Operating System again.
  • Dciman32.dll access violation
  • Cannot find C:\Windows\System32\Dciman32.dll
  • Invalid or corrupt dciman32.dll registry entry
  • Dciman32.dll not found
  • Cannot register dciman32.dll

The affected programs are


  • League of Legends
  • Any other programs installed on your system

Possible Causes


This error is solely related to dciman32.dll file. This file could be missing, renamed, corrupted or deleted.

There could be broken Registry keys in your system Registry database.

Fix Step 1

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Reregister Broken Registry Entries

The first possibility is that the file Registry entries have been corrupted. Unregister the file and re-register it again.

For Windows 8.1/ 8:

  • Press Windows Key + X.
  • Click “Command Prompt (Admin)”.
  • Type the following commands one by one:

    regsvr32 /u dciman32.dll
    regsvr32 /i dciman32.dll
  • Restart your computer. Press Windows Key + C, click the Settings icon and select Power | Restart.

For Earlier Versions of Windows:

  • Click the Start button.
  • Type “Command Prompt” in the Search Box.
  • Right click that in the Search Results, choose “Run as administrator”.
  • Refer Steps # 3-4 from Windows 8.1/ 8 user’s paragraph.

Restore Missing File

This file is originally stored in the System32 folder. Restore the missing file or download the file from the Internet and paste into the appropriate directory. Before downloading anything first scan it with an up-to-date Antivirus software. The file path is C:\Windows\System32.

The safest way to restore missing file is to use the Windows installation disc. You’ll have to expand the file from the Windows installation disc.

For Windows 8.1/ 8 and Earlier Versions:

  • Open Command Prompt. (Refer “Reregister Broken Registry Entries” paragraph for actual steps)
  • Type following command:

    expand X:\i386\dciman32.dl_ c:\windows\system32\dciman32.dll
    (Replace X with the drive letter of your DVD ROM)
  • Press ENTER key of your keyboard.

Reinstall League of Legends

League of Legends files could be corrupt. Reinstalling the program may fix Dciman32.dll error.

For Windows 8.1/ 8:

  • Press Windows Key + X.
  • Click “Programs and Features”.
  • Right click “League of Legends” program entry, choose Uninstall.
  • Follow the on-screen wizard, reboot.
  • Insert the game installation disc and launch the setup wizard.

For Earlier Versions of Windows:

  • Click Start, type “Uninstall a program” and press ENTER.
  • Refer Steps # 3-5 from Windows 8.1/ 8 user’s paragraph.

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