Open File - Security Warning

Error: Open File - Security Warning... The Publisher could not be verified. Are you sure you want to run this software? To address the above error via group policy locally on the workstation or server do the following: 1. start - run - gpedit.msc 2. expand "user configuration" 3. expand "administrative templates" 4. expand "windows components" 5. expand "attachment manager" 6. "enable" - default risk level for attachments. Tested on: Windows XP (sp3) Windows Vista (x64) Windows 7 (x64) For Windows XP (sp3): 1. start - run - gpedit.msc 2. expand - User Configuration 3. expand - Administrative Templates 4. expand - Windows Components 5. Attachment Manager set - Inclusion list for low file types- to Enabled and enter the file types you don't want to be warned about in the box (for example: .exe).