I've only use my acer aspire 5672WLMi for a couple of months but it seems the performance has decline greatly...how great? it affects the music that I played (really annoying lagging and skipping music), the cursor movement not smooth (can even feel the drag), i can't even play games with this kind of problems...when I first have it, i can still play oblivion with only negligible hiccups...but now, it has become a really BIG hiccups...I've already run disk defragmentation, freeing some RAM using software, but the problem still persist...what else should I do?