To speed up your hard disk by using Disk Defragmenter
1) Click start, program, accessories, system tools and start Disk Defragmenter.
2) Click the drive you want to defragment, and then click OK.
3) If you want to change the settings that Disk Defragmenter uses, click Advanced. Click Start.
While Windows defragments your disk, you can safely use your computer to carry out other tasks but this will slow down the defragmentation process dramatically. However, your computer will operate more slowly. To temporarily stop Disk Defragmenter so you can run other programs at full speed, click Pause.