Microsoft Windows Installer service is a built-in feature in Windows 2000, XP, 2003 and Vista. With it, developers is able to reduce total cost to efficiently build and configure applications for Windows systems.

You may encounter Windows Installer Error 1720 when you are installing a program. Installation may be ended prematurely or there may be a fatal error during the installation. Window Installer Error 1720 happens because Windows installer is unable launch the relevant source files for the setup of the application software that you are trying to install. Those files may be missing or corrupted. Normally the original MSI installation files will be cached in the ‘C:winntInstaller’ directory before installation is started. Improper caching of an MSI file is one of the main causes of the error also.

How to Fix Windows Installer Error 1720

Try the following solution to fix the Windows installer error 1720.

1. To fix the error, you have make sure you have the latest version of InstallShield installed your computer. If not, then update it to resolve the error.
2. If the installation is unable to locate the required files, try to use the Windows’ ‘Search’ feature to look for the files and provide the location to the installation process.
3. You must logon as administrative before you do the installation.
4. If you are installing over a network, please ensure that you have full access right to the network location where you are running the setup.
5. If the windows installer error 1720 remains, you may need to use a PC error Fixer or registry cleaner to scan your computer. Those tools are specifically designed to rid your computer’s registry of the left over wreckage resulting from unsuccessful installations. It will clean out the problem behind unsuccessful installations by cleaning from your registry all of the unnecessary files and harmful programs that interfere with regular computer functions.  It is the one-stop solution to most of your computer malfunction problems and can rid you of those “installation error” messages, directly.

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