Hi there, I've got a 2011 15" MBP (i7 2.2, 8GB RAM, HD6750, 750GB Stock HDD, 10.7.2) and in the last couple weeks, it's showing some major slowdown issues. I can't pinpoint why, but 'everything' feels slower. Boot up takes longer, opening apps takes longer, and then there's the more noticeable issues for example; iTunes playback stutters regularly, to the point tracks are almost unlistenable. When using virtual instruments in Logic (Kontakt for example) playing more than 2 notes simultaneously results in further notes being cut-off. Clicking on menu bar items 'File/Edit/View' etc results in a few seconds wait when it used to be instantaneous. In PhotoShop, switching brushes, painting on even small canvases results in long wait times. I've been a Mac user for ~8 years now and this is the first time I've seen anything remotely similar. Even typing this message the cursor is freezing after every few words. I've checked Activity Monitor and nothing appears out of the ordinary, over 6GB of my RAM is showing as free, and 90% of my CPU free. When using Logic the CPU/RAM meters idle happily near 0. Also, prior to these issues, I could run Logic tracks with many instances of Kontakt/other AU's without any problem at all. I've tried the usual reset PRAM, repair permissions etc and no luck. I've also checked the HDD in Disk Util and apparently it's fine (from a verification point of view). Any ideas? I'm only 5 months into the warranty so I'm covered, I also have AppleCare but I rely on this computer daily for work so I'm wondering if there's anything you guys could suggest before I take it into the Apple Store.