It's not hard to fix Internet Explorer 9 issue completely, we recommend you automatic way.
1.Click Start button, and then enter into Control Panel.
2.From the open menu go to ALL Programs and from the opened list click on Internet Explorer.
3. Click on Internet Options and select Trusted sites and enter into Custom level.
4.Scroll down to Downloads setting and enable File Download. Finally click OK.
Note: Not all add-ons can be removed. Some add-ons are necessary for Internet Explorer and your PC to work correctly.
Open Internet Explorer, select the Tools button, and then select Manage add-ons.
Under Show, select All add-on and then select the add-on you want to delete.
If the add-on can be deleted, you'll see the Remove option. Select Remove and then Close.