Deschide Internet Options din Control Panel-->tab-ul Advanced-->Reset.
Nu stiu daca va rezolva ceva, dar merita sa incerci :).
Mai vezi si astea:
http://support.microsoft.com/kb/967896
http://support.microsoft.com/kb/932540
http://secunia.com/......quires_ie8
http://forums.techarena.in/windows-software/1178505.htm
http://www.pcreview.co.uk/forums/thread-683253.php