The problem is, you have a non-english character in your username. (or more precisely the scripts folder of maya)
Like é,á,ú,ű,ó,ü,ö or any other. You should create a different windows user with only the 26 english characters in name.
Maybe you could also re-route the scripts folder for maya, but I dont know maya, and we just fixed this for my friend as well by simply creating a new windows-user.
(you can transfer any data from your old account by copyying the appdata folder to your new accout)
I know, that this is a very ugly workaround, but at least it can be done in 5 minutes. 