Defragment Your Prefetch File for Faster Booting
Windows XP monitors the programs you use and regularly rearranges files so that your most frequently used applications can be loaded quickly. This process is known as prefetching. There are various adjustments that you can make to this by adjusting your system settings or tweaking the registry, but most are of negligible benefit: the single best thing you can do is defragmenting the prefetch data, so it will run more efficiently. Click Start > Run and type “defrag c: -b”. Press [Enter] and your boot files will be optimised for you.