nah its about a year old ive stopped using so many mp3s of recent and thats kinda sorted it a bit stopping the cache getting so full. im just about to run a register cleaner and see if that helps. really weird??!!
i suggest you a clean install, maybe dual boot system, one for ableton only and one for the rest of applications. in ableton windows you can kill all usless windows services and make a perfect live system. try it!