Windows 7 No File Opener

[Adam5]

Hi I know it sounds like a kinda pointless thing to do, but does anyone know how to reset default file opener to "no program" in a windows 7 computer.
And reset it back to this:

little icon. I accidentally set the wrong default file opener, and I don't have any other program to open this type of file. And I want to reset it back to no program

 

[Neemobeer]

Yes, you need to

• look in the registry under HKEY_CLASSES_ROOT for the file extension such as .txt.
• Select the extension key (in this example .txt) and look at the default value. In my example it says txtfile.
• Now scroll down or search for txtfile, which will also be under HKEY_CLASSES_ROOT and expand it
• Then expan shell and lastly open
• select the command key underneath that
• Blank out the (Default) value under the command key

 

[Adam5]

Thanks sorry it took weeks for me to respond.