Ok. I don't have a windows 7 machine to see if this would be pertinent as far as registry entries, but please have a look at this knowledgebase article from Microsoft.
Although this lists both Windows Vista and Windows XP, it is very possible that it could be identical in Windows 7. This article requires entering your Registry on your computer which can be dangerous if done improperly. Before making ANY
changes to your registry on your computer please set a Restore Point
. This will allow your to "roll back" if something goes drasticly wrong.
In the Microsoft Knowledgebase article, you will see a blue tab to the left that says "let me fix it myself". This is where we want to look for the instructions. The first entry points to Windows Vista.
Step 4 points to the Registry Location where you want to go. IF
you do not find an entry that is absolutely identical to what is listed in the article, please go no further and we will look in another area or try another means of fixing this.
Follow the Knowledgebase Article to the letter from steps 1 through 12.
Let us know if this fixes your problem.
Hope this helps,