Recently there was a problem i faced, when i tried to open an *.xlsx file which came in my mail. It wouldn't open. Its icon looks like an unrecognized file (not damaged nor corrupted). I have Microsoft Office 2007 installed. & Everything was fine uptill today. I tried changing the openwith option, but it acted as useless. Also I tried editing the actions for xlsx files in

Tools => Folder Options => File Types.

I also tried unintalling & reinstalling Office 2007. But all efforts in vain. One of my friend too compained the same problem recently.

Do help me