I have been running my new SSD (Crucial M4, 128GB) with clean install of Win 7 for a few days and am very happy so far. During the clean install I had to updaye my Norton Security Suite, that I get free as part of my Comcast cable subscription. I happened to open that tonight to see what was new and noticed the PC Tuneup was enabled. I read up a little about that feature and became concerned. One of it's features is the Disk Optimization, which was enabled. Apparently that does something similar to a drive defrag in real time. I immediately disabled that feature as Never Run. I am not sure it has run or would have run on the SSD but I am not taking any chances. If you are running Norton with an SSD please have a look at this feature and tell me if I over reacted