Try this Knobler,free program.
Download the Registry Optimiser free trial version,there are no limits.
Goto the advanced tools section and optimise internet explorer.
The only difference to the full version,is when scanning your registry,the trial version only fixes 10 errors at a time.
Ive used this for 2 years to good effect.
If it dosnt sort your problem,its a handy tool to have anyway.