- If the ESET error code MSI 1601 is displayed, then it represents that the Windows Installer is not available for installing ESET.
- To resolve this error, check if the installer service is running properly.
- Select the Run option from the Start menu and then type msconfig. Tap the Enter key.
- Navigate to the Services tab and find the Windows Installer service. Select it and click the OK button followed by the Restart button to restart the system.
- Install the ESET product and check if it is being installed properly.
- Now, you re-register Windows Installer on your system.
- Go to the search bar available in the Start menu and then select the All Files and Folders option.
- Type the file name as Msiexec.exe and tap the Search button.
- Once you find the file, note down the location of the file.
- Next, type regedit in the Run dialog box. Locate the GKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSIServer.