Fix: Error Code 1601 Windows Installer

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Problem: Each time I want to install or uninstall a program that uses Windows Installer, I get the following error with code 1601: The Windows Installer Service could not be accessed. This can occur if you are running Windows in safe mode, or if the Windows Installer is not correctly installed. Contact your support personnel for assistance. Difficulty: Moderately Easy.

Fix: Error Code 1601 Windows Installer – Windows 7 or Vista

  1. Click Windows Start button, in the Start Search box, type the following command and then press enter:

    %windir%\system32\msiexec /unregserver

    Nothing will be prompted to you because the registry process takes less than 1 second to be completed.Fix: Error Code 1601 Windows Installer

  2. Next, go back to the Windows Start button, in the Start Search box, type the following command and then press enter:

    %windir%\system32\msiexec /regserver

    Now that the msiexec has been re-registered, you may try to run any Windows Installer to test if the problem is solved.

Fix: Error Code 1601 Windows Installer – Windows XP or 2000

  1. Click Start -> Run -> type CMD in the run box, and then click OK.
  2. A MS DOS window will be prompted to you. Type the following command and then press enter:

    msiexec /unregister

    Do not close your MS DOS window after this step.

  3. In the same MS DOS window after performing step 2, type the following command and then press enter:

    msiexec /regserver

    Now that the msiexec has been re-registered, you may try to run any Windows Installer to test if the problem is solved.

Update: As for the new Windows 8, if this error ever pop up to you, the method of solving is pretty much the same as in Windows 7. The difference is only the way you open your command prompt, which is fairly easy in Win 8. Well, this problem has been fixed since the release of recent patches. You may also want to try some registry tools, such as registry easy (download), to check for any missing/corrupted registry in your windows and fix them automatically.

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  • weekends in berlin

    the msiexec has been re-registered, you may try to run any Windows Installer to test if the problem is solved.

    Read more: http://www.computertipsfree.com/fix-error-code-1601-windows-installer/#ixzz16rXf5WsF

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