Here I take video pioneer as an example. The original computer video file is the default software of the system. But when I install the software, the software automatically sets the default software for opening audio and video files as audio and video pioneer. This is the problem. Even if I set the default open software back to the default software, every time I open AV Pioneer, the AV file will be automatically set back to AV Pioneer.
Therefore, if in a healthy system environment, the default software of this file will be changed by this software.
The solution is to deal with it under the software settings.