How to Fix Error 1720

by Ramya Hariharan

An Error 1720 is a Windows error which occurs during software installation and can cause the installation to crash or stop. This usually occurs when the Windows Installer is unable to find the necessary source files needed to install the program. These source files may be corrupted, missing or in a different location. However, following a few simple troubleshooting guidelines will help you solve this problem.


Check whether you are in administrator mode using "User Accounts" in Control Panel. If not, log out and log in again using an administrator account.


Check whether you have the latest version of InstallShield on your computer. If not, download the latest version and install using default settings (see Resources).


Download and install a registry cleaning software and try to solve the conflicts and problems in the registry (see Resources).


Make sure the disc is not damaged or corrupted if you are using a CD or DVD for installation. Clean the disc with a piece of cloth. If the disc is corrupted, get a new installation disc.


Uninstall the previous version of the software completely and restart you system, then try a fresh installation.


Find the path for the source files and give the path of these files during the installation using the "Browse" button.

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About the Author

Ramya Hariharan works as a technical writer & business development manager in Chicago area. She has been blogging, writing and developing content writing since 2005. Hariharan has previously worked with freelance clients such as Textbroker, Insiderpages and Judysbook. She holds a Master of Business Administration degree in human resource and finance from the Sathyabama Institute of Science and Technology Deemed University.