Install Lion X and the apple id you entered couldn't be found or your password was incorrect

thanks again. I had to install iTunes on my PC and update my Apple ID information, that fixed it.

But when I continue with the installation of the operating system I get a new banner that says "this article is temporarily unavailable". What I do?

Can I download an S.O to a pendrive and boot from there? what version and from where? It's free?

I always used windows, never mac so this is all new to me.

I was finally able to install the High Sierra system on the Imac. I'm glad I didn't have to change the hardware. It was just installing the operating system.

Also, I was seeing that this Imac mid 2011 of 27' came better prepared than the conventional ones, modified since its purchase in the apple store. Instead of i5 it has an i7 3.4ghz, and instead of 512mb GPU it has 2gb.

Thanks everyone for your help

Thanks, it seems to have worked but now I get the following banner:

this apple id has not used with apple store

Please review your account information