This is what your hard drive looks like when it needs a defrag. To check if you need to defrag your hard drive, open the defrag tool. Folks with WindowsXP should be able to find the Disk Defragmenter by selecting Start => All Programs => Accessories => System Tools => Disk Defragmenter. Select a disk and click the Analyze button. After a while Disk Defragmenter will tell you whether or not you should defragment. If it needs it, do it. Sometimes, if your disk is full you may need to make space. My new RAM turned up today and I am now running with 4 GB.