There are times when you face but cannot fix Cannot Open The File error when you try opening any unrecognized file on Windows 7 and Windows Vista. There are files which were accessible earlier and suddenly Windows 7 shows them as unrecognized files.
Cannot Open The File type of errors generally occur do to a virus or malware attack on your computer. Here is a simple way to fix this type of errors using a free tool namely, File Association Fixer.
File Association Fixer works on Windows Vista too. This free tool offers 18 association fixes for Windows 7 and 26 association fixes for Windows Vista. All you need to do is download this tool and double click on it. It will prompt to restart your computer and that is all. Now, you can easily access those files which are not being opened.