Unfortunately, you can not disable this on IE unless you use Kiosk Mode:
http://support.microsoft.com/kb/154780
You can use Alt+F and arrow keys as workaround.
Category:
SparkView
Unfortunately, you can not disable this on IE unless you use Kiosk Mode:
http://support.microsoft.com/kb/154780
You can use Alt+F and arrow keys as workaround.