I've got a HP Pavilion 15 Sleekbook ( Windows 8 ) and I can download almost anything on it. Maps, mods, massmarkings, items, interface, textures, presets, pretty much stuff like that. However, I cannot download meshes because it will makes my game crash immediately. I've seen presets that are .fhp files and I cannot open files like that, so yeah.
It's a good computer, good virus protector and everything but every few months I have to delete the icon and download it again, because it will lag majorly after a period of time.