Open NAT type?

Hi All, when i try to open an password protecttion excel sheet. It prompt me this message "Excel cannot open this file. The encryption type used is not available, contact the author of the files. More encryption types are available using the High Encryption Pack". When saving the excel file with...

When i try to right click ANY FILE I CLICK ON it says "This file does not have a program associated with it for performing this action. Please install a program, or if one is already installed, create an association in the Default Programs control panel" I dont want to have to do that every time....

What the title says - see screen shots Be aware that is NOT just an issue with ZIP files - its an issue with the Choose default program option on EVERY file type. I tried the Remove & Restore Open With registry patches from here, and rebooted - didn't fix I tried minimal Safe Boot -...

I used to be able to open replays of a certain game (Warcraft 3) just by simply double clicking on them. I reinstalled w7 2weeks ago, along with the game. Now when I double click them, it doesnt know what program to use --> I go through the standard "open with" and find my war3.exe. Now when I go...

I have windows 7. I'm getting odd behaviour from my machine. I can only type in search boxes intermittently, other times when I press a letter the shortcut droplist comes on---"F" is find and so on. Only light on my keyboard is Num Lock, so I don't think it's a keyboard issue. When I left...