Double-click Open File is the most basic operation of the computer, but it is such a simple action, the operating system will often be mistaken. For example, if you want to open a picture, if the Win7 installed two software that can open the picture, the system is likely to confuse the two software, calling the wrong program to open the picture. Although Win7 is very intelligent, but not so understanding of the point, but as long as we want to use what program to open the file to tell Win7, it is definitely a good boy obedient. What we are using here is the file association settings in Win7.
Take a video file for example, first, open a folder that holds pictures or photos. Right-click on any picture file and select "Open mode-Select default Program".
Open the Select Default Program setting item
Select the program you want to use in the recommended programs in open with.
Select the recommended program
If the program is not listed in the "Recommended programs" list, you can click on the "other programs" on the right side of the small Black arrow to continue to find, if still can't find, then click the lower right corner of the window "Browse" button, through the directory search.
Select More Programs
After you find the program you want to associate, check "Always use the selected program to open this file," and finally click "OK" to save and exit.
Check "Always use the selected program to open this file"
After this setting, this type of file will be opened by default using the program you selected. If the computer does not have a program to open a certain type of file, you can also click on the "Find the appropriate program on the Web" link, Win7 will help you find in the network can open the type of file program, and give the program to download links.