1-Open the Start menu, go into the "Administrative Tools" folder and select "Group Policy Management."
2. Right-click on your primary Group Policy Object from the list on the left side of the window and choose the "Edit" option. This will launch the Group Policy Object Editor tool.
3. Open the "User Configuration" and "Windows Settings" folders.
4. Right-click on the entry labeled "Internet Explorer Maintenance" and select "Preference Mode."
5. Double-click on the "Programs (Preference Mode)" icon to view the additional Internet Explorer settings.
6. Click on the radio button next to "Import the Current Program Settings" and then press "Modify Settings."
7. Click on the "Make Default" button in the "Default web browser" section of the window.
8. Press "OK" twice to save the Group Policy Object settings. Now Internet Explorer will automatically be the default browser for all computers on the local network.
Note Preference mode settings are set by an administrator; however, you can change the settings after the policy is applied (for example, your home page or settings on the Advanced tab). After the policy is applied to a client computer, you can change your home page and advanced settings.
If the administrator does not want users to change the settings, the administrator can apply a restriction by using the Administrative templates in the GPO.
من راه حل فوق رو پیدا کردم ولی منظورش از بند 4 رو متوجه نمیشم!!!