Error “the Windows Installer Service Could Not Be Accessed” In Windows 7/Vista

When you try to install a program which uses Windows Installer in a Windows 7/Vista computer, you may receive the following error.

The Windows Installer Service could not be accessed. This can occur if the Windows Installer is not correctly installed. Contact your support personnel for assistance.


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This error may occur even though Windows is already in normal mode.

Resolution

Start the Windows Installer service

  1. Click Start, type Services.msc and press {ENTER}
  2. Double-click Windows Installer
  3. Set the Startup type of Windows Installer to Manual
  4. Click Start to start the service. Note down the error message if any.
  5. Click OK.

Windows Installer Registry Fix

If the above steps do not help or if the Windows Installer service is not listed in the Services applet, follow these steps:

  1. Download msiserver.zip (for Windows Vista) | w7-msiserver.zip (for Windows 7).
  2. Unzip the file and extract msiserver.reg to the Desktop.
  3. Right-click msiserver.reg and choose Merge.
  4. Click Yes when asked for confirmation.
  5. Restart Windows.

47 thoughts on “Error “the Windows Installer Service Could Not Be Accessed” In Windows 7/Vista

  1. Thnx you very much it was working well.
    i was always search many solution but, they was giving a wrong ida.
    But it was a simple way.
    Thnx

  2. grazie mille oh scaricato w7-msiserver.zip (per Windows 7). funziona!!!!! grande ancora grazie

  3. RT quote:I cannot tell you how MANY websites, solutions, options I have tried, and then I stumbled upon this. You are a god among mere mortals, thank you thank you thank you!! I worked perfectly!
    helpfull
    many tq

  4. I cannot tell you how MANY websites, solutions, options I have tried, and then I stumbled upon this. You are a god among mere mortals, thank you thank you thank you!! I worked perfectly!

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