Just recently I installed the Photoshop CS4 and Lightroom 2.1 I’ve noticed my computer kind of slow. At first I thought it was my internet connection, but silly me I wasn’t online when I installed the Photoshop CS4 and the Lightroom. I found out I don’t have enough system memory to run both programs. I uninstalled the Lightroom for now; I’m going to install it back as soon I buy bigger memory.