I am curious to find out if you ever run SSIS package on this machine.

My office work environment uses a Standard edition sql 2005 on Windows 7 professional. The control flow script task can not be open. When I drop a Script Task into a package, navigate to "Design Script" button and click. The dialog dissapears, no editor ever appears - no error message.

Framework 4.0 is installed. I also downloaded Framework 2.0 sdk. SQL 2008 R2 was installed and uninstalled to narrow down the possible conflicts.