I updated to Lion the day it was released and it was fine. Slowly and slowly it has become very very very slow. For instance, I just restarted my laptop (white unibody Macbook 2010 with 4GB RAM and 2.4ghz C2D) and I waited about 10 seconds after it had started to open iTunes and opening it took roughly 30 seconds, the laptop doesn't lag or crash or anything when it's loading, the icon will just bounce really smoothly until it opens and once it's open it runs fine. If I have a few apps open such as iTunes, Steam and Chrome, and I want to open Word or something it will literally take minutes for it to open, but once it's open it runs fine. Multi-touch gestures are smooth and work fine also. I have tried repairing permissions and the disk to no avail. Some apps like Mail and iCal load pretty quickly (they bounce once or twice before loading) but other apps like Chrome, Skype, iTunes and MS Office take the longest. If I opened them and closed them and then re-open them they would load pretty much instantly but if I left them closed for say 10 minutes they would take longer to open again. I was wondering whether reinstalling Lion through Lion recovery would make a difference? (I was going to do a clean install of Lion but I would then lose iLife that I no longer have the disc for. And the only thing I can backup with is a 16gb USB stick) Oh, and I do have a lot of stuff installed so I'm not sure whether that would make it slow? Games like L4d2, CSS and Garry's mod are all installed. I have about 160GB of my 250GB HDD left. So yeh my main question is would reinstalling Lion via Lion Recovery make my laptop go to the fast speed that it was when I first upgraded? Thanks for your help.