Article #29059: Error uninstalling Delphi 6: Error 1926. Could not set file security for file Filename.msi
Problem
When attempting to uninstall Delphi 6, the following error is raised: Error 1926. Could not set file security for file \somepath\Filename.msi and the uninstall fails. (somepath represents the path of the file listed in the error message and Filename.msi represents the file name also listed in the error message.
Resolution
This problem is due to a lack of privileges on the specified file. Make sure you are logged in as administrator and have sufficient privileges to modify the security permissions on the file in question. Once you do this, the problem will be resolved.