Once again, that’s factually incorrect wherever you’re getting your information. Take a fresh install of Windows 8 or 10 it opens a TS container without any issues, windows foundation and directshow codecs support MP4, AVI, TS and most other popular formats, infact Windows 10 also supports MKV.
As for your error about codecs not found that’s back to my point 2, the actual video codec. I don’t know what video codec is contained in your TS files. If you want you can upload a copy of your TS file to our server and we can play it here to see it works on a stock system.
We have been saying for years that installing 3rd party codec packs like K-Lite and Shark just break the system. FFDShow is the only pack designed to work with windows instead of hacking and breaking the system.
I know you’re facing problems and it could your codecs packs which breaks windows media foundation, there’s no way to know unless you either upload the videos or take a fresh install of windows and try it out.