[Q] problem with "play to" topic

Hi every one.
I've got an ASUS TX 300 CA that came with windows 8. I've put windows 8.1 update1, and everything was working great for almost 1 year.
Suddenly, when I plug the PC in, I've got a message asking with what app the PC open a .tmp file that does not exists... weird.
I order to get rid of this problem, I reinstalled windows 8.1 update 1.

That failed.... windows is OK, but the problem is still there.
Moreover, now I can't use "play to" to send films, musics, of photos on my TV... The PC does not see my TV anymore...

So here is my question. How can I make my PC see my TV???? (knowing that is was working like a charm before reinstall)
Is there a crucial service or something I may have stupidely stopped....?

Please, I need some help, it's making me mad. the little problem when plugging the PC is not important, but the one with "play to" is crucial for me.

Thanks.