File Folder Extension Problem After Installing SP1

Hi,

I've encountered the following problem after installing Windows 7 SP1: Every time I try to open a folder with a double-click, it gives me the error message: http://b.pix.ge/d/ucpdn.png
But if I right-click the folder and select 'open" then it works. How can the problem be solved?

Any help will be greatly appreciated!

I have the same problem. In my case it happens on double clicking any of the drives.

Windows 7 Service pack 1 update bug

Thanks. I'll move to that thread :)