The Lounge is rated Safe For Work. If you're about to post something inappropriate for a shared office environment, then don't post it. No ads, no abuse, and no programming questions. Trolling, (political, climate, religious or whatever) will result in your account being removed.
The best option out there is the one you are doing: no format problems, it works always... but I don't want to have to connect/disconnect the laptop each day I arrive home, I want my wife to be able to see the TV while I'm out... After what I've read I'll search for a box that can do it.
Ah you see, my laptop is not a work one and doesn't travel with me. In fact it mostly lives on a little table next to the TV when not being used for something. I had to talk my wife through getting it on the TV yesterday. She coped with plugging it in but didn't know how to get the display on the TV.
Some men are born mediocre, some men achieve mediocrity, and some men have mediocrity thrust upon them.
If you want it cheap, get a Chromecast, if you like me prefer to have a remote, then an Appletv will suffice.
But before you go shopping, check for updates to your TV, there might be a Netflix app around that just didn't get installed because there was no Netflix around in Spain.
The Western Digital WD TV Live Plus model supports Netflix in US, Canada and Australia, and perhaps other countries. See this[^] PC Mag review. But I think it's best to confirm Netflix Spain support with Western Digital before buying it.
You can get an HTPC case, then it just looks like another stereo component. If you auto-run Kodi or similar, you never have to see Windows
Kodi has add-ons that let you run it from an Android / iOS device through the network if you want...kinda neat but I still prefer my mini-wireless keyboard and keep my tablet for surfing the net while I watch TV.
Kodi also has an add-on that lets you run Netflix inside Kodi...I haven't tried it, myself.