I had the same problem on one of my computers and went looking for an easier way to do this.
The program I'm using now is called powerdefrag and you can get the free version at www.powerdefrag.com and this has worked for me, so give this a try.

Good luck
Martha Shade


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.502 / Virus Database: 300 - Release Date: 18/07/03

               The NOSPIN Group Promotions is now offering
              Mandrake Linux or Red Hat Linux CD sets along
             with the OpenOffice CD...  at a great price!!!
             http://freepctech.com/goodies/promotions.shtml