So in order to get it fixed I need a new computer is what you saying?
However I havn't allways had this problem. Maybe in the past 4 months.
if it coincided with the release of the brits (sep 2015, ~~6 months) then it's not surprising as the brits added (at a guess) ~~25% more content to load (it's probably less but if you were borderline before it could be significant).
other people have reported performance degrading over the game's history and while i haven't had issues myself (high end system and not paying attention) i'm not surprised; the game is certainly poorly optimized in the first place.