Try re-installing IE8:
1. Click Start and click Control Panel.
2. Click Programs and Click Turn Windows features on or off under Programs and Features.
3. Uncheck the box in front of Internet Explorer 8 in Windows Features panel.
4. Click OK and restart the computer.
5. Repeat step 1 and step 2.
6. Re-check the box in front of Internet Explorer 8 in Windows Features panel.
7. Restart the computer.
Now launch Internet Explorer 8 to see if the issue persists.
Best Regards
Dale