Hi! Firstly my stats. I'm using an iMac 2.8 GHz and running OSX 10.5.8. Plenty of memory - 135GB on the HD, ca 1340mb of RAM Just recently my Mac has started running very slow. There's a lot of lagging, spinning beach-ball... Working in Photoshop is becoming a pain, simple things such as switching tools cause long delays. If I'm listening to streaming music whilst working in Photoshop sometimes the music will "stutter", as if there were memory problems, but as I say I have plenty of memory. I bought the Mac less than a year ago! Some ideas I have: Recently my printer died so I bought an HP wireless Photosmart c6380 All-in-One. Got it all set up and working fine. I also have an HP Scanjet scanner previously installed (usually use it in Photoshop through TWAIN) and at first I could use both but all of a sudden I'm having problems, my Mac can't find the Scanjet. I wonder if there could be a connection between the newly-installed HP software and my suddenly slow Mac? Think I read somewhere that there were issues between certain HP software and OSX? I notice in Monitor that I have 1 permanently stuck process (but I don't know what). Could that be of significance? Have repaired permissions, and run Script Maintainance. No improvements. I'm no Mac expert by far so I don't really know what else to try... I'd be very gratefull for any tips you guys have Thanks in advance!