Like most Windows applications, Acrobat and Reader use Microsoft Windows Installer technology for installing updates.
The wizard updates the Windows registry so that you can usually uninstall previous versions of the program, or install or update the current version successfully. MST file could be missing from its original location or corrupted.This error indicates that your Acrobat/Reader installation was customized with the use of a Transforms (. This error could also occur when downloading and updating with the Adobe Application Manager.The error can be bypassed by downloading the update separately from installing it.The installation source for this product is not available.Verify that the source exists and that you can access it. Verify that the patch package exists and that you can access it.
Or, contact the application vendor to verify that it is a valid Windows Installer patch package.Try using the Microsoft Fix it wizard, available at Alternative solution: This error sometimes appears when a drive is mapped for the user and the installer is running in a system context.Change the access permissions on the network folder to “write” for everyone to the shared folder or drive.Adobe does not support third-party software and provides this information as a courtesy only.If you cannot resolve the problem after using the Fix it wizard, see the solutions in Error 1606 | Install | Acrobat 8, 9 | CS4.