How does Win7 cancel file association?

Recently, some Win7 users have reflected that they have selected the wrong program when opening the file, causing other files to have errors, and thus unable to open the file. What is going on here? What should I do? In fact, because there is an association between the files, we only need to cancel the file association. So how do you cancel the file association? The following small series for everyone to introduce Win7 cancel file association method.

Steps:

1. Press win+r to open the run window and type regedit as shown:

2. Open in turn: HKEY_CURRENT_USER\\Software\\Microsoft\\Windows \\CurrentVersion\\Explorer\\FileExts\\.pd, as shown:

3, under the OpenWithList registry, the registry keys except the "default" & rdquo; in the right window are deleted, Finally, you must delete the "UserChoice" registration item.

The above is the method of Win7 cancel file association introduced by Xiaobian. Through the above steps, after the operation is completed, you can open the file.