Any safe way to convert WMV to MP4 on PC that keeps the original quality?

You can try the system "Photos" App export method? Absolutely! This method is definitely suited for beginners who want to convert WMV to MP4 without delving into any complex software or command lines. Using the built-in Photos app makes it super straightforward, and since it’s a system app, you won’t have to deal with ads or dubious downloads, which is a huge plus. 

You just open the WMV file in Photos and follow a few prompts. No techie skills required! Since the Photos app comes with Windows 11, there’s no need to download anything else. It’s all right there on your system. You won’t be bombarded with ads or complicated settings. It’s a straightforward export process. The app handles the conversion for you, so you don’t have to worry about finding separate software or figuring out settings.

If you’re just converting WMV to MP4 here and there, it’s perfect. Just keep in mind the limitations regarding batch processing.