Edited

To soon to tell
You may be right about your feelings,but you cannot know for sure.
If i were you,i'd say;i wil see what i can do about your computer(if she lives near)
If she does not show appreciation then,you know you are taken for granted.
Personally i do not see anything wrong with her reaction,she could not read the papers,so she does not know what she has to be gratefull for(although she could have thanked you for your action alone.Some people are a bit slower than others,give her another chance,and perhaps even more chances if there is nothing else thats bothering you.
You can also tell her you,like everyone,need to feel appreciated.