Hope this is in the right section since it's graphical related.
Anyway I have recently acquired myself a new computer, which I promptly decided to name J.A.R.V.I.S.

I wanted to fit my new computer to give it a J.A.R.V.I.S appearance, I've only found a background that I ended up using.
Yet I came across screenshots of people's backgrounds that changed the whole theme and icons into what I was looking for.

Now I've long had interest in Windows related themes but was always afraid to use it, cause I couldn't have a legit answer to see if it was legal to be used and even safe to use at all.

Tried using rainmeter but it doesn't seem to load the skins I found and one that it does detect has a password blocking access.
To which i need to fill in and complete a survey to get the password, yet that seems way to sketchy to be trusted in my p.o.v.

So does anyone have any information on windows themes or just can help me out to achieve what I want to obtain?

For those who don't know: J.A.R.V.I.S is the computing system utilized by Tony Stark for both his mansion and Iron Man suit.

Rainmeter is totally legit and awesome, not sure what happened to you though.

I've used a couple Windows Themes now and then but the reason I don't end up using them is because it's not 'me'. I always prefer to do things my own way. But it's completely safe to use. (assuming you get it from a legit non-shady website).

It could be the type i'm looking for is a rather limited one thus finding no success to get a properly working one.

Thing is how can you say for certain nowadays what is a Legit and Non-Shady website?