Try to reset Internet Explorer:
Exit all programs, including Internet Explorer (if it is running).
If you use Windows XP, click Start, and then click Run. Type the following command in the Open box, and then press Enter:
inetcpl.cpl
If you use Windows Vista, click Start. Type the following command in the Start Search box, and then press Enter:
inetcpl.cpl
The Internet Options dialog box appears.
Click the Advanced tab.
Under Reset Internet Explorer settings, click Reset. Then click Reset again.
Click to select the Delete personal settings check box if you also want to remove browsing history, search providers, Accelerators, home pages, Tracking Protection, and ActiveX Filtering data.
When Internet Explorer finishes resetting the settings, click Close in the Reset Internet Explorer Settings dialog box.
Start Internet Explorer again.
Internet Explorer - Reset