Symantec Critical System Protection agent upgrade from an older version to a newer version fails with error 1260 if Microsoft hotfix 2918614 is installed on the windows agent.
Error 1260: Windows cannot open this program because it has been prevented by a software restriction policy. For more information, open Event Viewer or contact your system Administrator.
Microsoft has released security bulletin MS14-049. This bulletin contains information about the known issues with the Security update for Windows Installer Service. The bulletin provides workaround which is mentioned below.
To resolve this issue perform the following steps as per one of the option provided by Microsoft in the above KB article. To know more options please visit http://support.microsoft.com/kb/2918614.
Note: Ensure that you follow the procedure carefully. If you modify the registry incorrectly, you may face critical problems. For added protection, back up the registry before you modify it.
To modify the registry:
Click Start > Run.
Type regedit, and then click OK.
Locate and then click the following subkey in the registry: