Horrible Lag

[jolly richard]

i'm not a computer expert,quite the opposite really lol so hopefully i can get some help here.Anyways POTCO has become so laggy lately that my entire gameplay pretty much consists of freeze frames and it's almost like reading a comic book...it's that bad;occasionally the game will freeze completely and go into a white screen saying "pirates(not responding)" that can last from a few seconds up to 10 minutes and has caused me to go to jail many times.Even the loading screens take forever,they get stuck at 75 and 81% and go into a white screen a few times.I don't have a clue what's causing all of this,any advice is appreciated.