1. Go to Start => Control Panel => Regional and Language Settings.
2. Click on the Languages tab.
3. In the first section, Text services and input languages, click on the Details... button.
4. Then in the section Installed Services, you will see a list of the already installed languages/keyboard layouts. For a standard American installation, this list will contain the language English (United States) and the keyboard layout US (which is selected by default). Click on the Add... button to open the Add Input Language dialog box.
5. Select English from the first drop-down menu. Select United States-International from the second drop-down menu. Click OK.
6. Notice that United States-International now appears in the list of installed keyboard layouts. Look at the section Default input language above. Select English (United States - United States-International from the drop-down menu. This layout will now be selected automatically every time Windows starts.
7. Click OK to close the Text Services and Input Languages dialog box.
8. Click OK to close the Regional and Language Settings dialog box.