Cannot choose single/double click in explorer->tools->folder options

Cannot choose single/double click in explorer->tools->folder options

After re-install of Win7 Ult my mouse acts as though single click is selected. When I go to Tools>Folder Options double click is selected and single click is grayed out. I'm hoping to find a registry hack to overcome this problem. I am open to any and all suggestions. I really do not like single click.

By the way I have tried multiple mice with the same results

This should be the appropriate setting ... double click is selected by default, but you can change it to single click.

What you are facing might ve due to some system file violations. There are few tricks of solve it.

At first try http://www.sevenforums.com/tutorials/1538-sfc-scannow-command-system-file-checker.html .