About three weeks ago i was interning in china. Well, they had a Macbook that i restored to its original factory settings because it was so cluttered with erroneous files that it was easiest to just wipe it and start anew. Well i left there and now my boss is saying this OK I will get him to text you as soon as he gets in and he can tell you in more detail what is happening. When I have used it has suddently gone so slow that it appears the computer is not responding then very slowly it types up one letter at a time. The other problem that I have had is that the cursor suddenyl jiumps back or up and you finds yourself typing in the mdidle of the previous sentence. What could this possibly be? I really appreciate the help! PS they added new RAM while i was gone (went from 2gigs to 4) but insist that the problem started before they added the ram.