How to restore the Win7 system application default open mode?

There are now too many types of applications of the same nature, such as a variety of players. After many users download a new player, the original video file will be opened. Of course, some of the more fluent software will change the way some files are opened. In this case, what should we do to restore the default open mode? The following is a brief introduction to the default method of the Win7 system application default open method.

Open reduction method:

1, first create a notepad, then copy the following code into Notepad inside, i.e., the content of the INF file:
[ ,null,null,0],Version] Signature="$Chicago$" [DefaultInstall] DelReg=DeleteMe [DeleteMe] HKCU,"Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\FileExts\\.exe" HKCU,"Software\\Microsoft\\Windows\\CurrentVersion \\Explorer\\FileExts\\.lnk"

2, then save it as an arbitrary file name, and the file with the suffix INF can be!

If the default opening method of the user's own changes is acceptable, many software will bundle some other useless software when downloading. At this time, it is very likely that these software will silently change the opening of some files. In this way, we need to use the above method to restore the default open mode for this phenomenon.