1. I will be brief - to translate these two articles ? 
I believe you can translate them both, yes, but wait first to be published in our "In Progress" section. Or, alternatively, you can translate them and, after they are added to "In Progress" section you can mention their translations
It's up to you, DrBeer Your prayers have been heard and, since nobody has shown any objection, the windows tutorial appears now listed among the translations in progress; so you can proceed with the task DrBeer
Let's wait a little longer for the Linux tutorial which, of course, you are free to translate on your own in the meantime.