It depends on what you mean by it's "original state." Do you mean wipe the hard drive and start over, or repair Windows and/or Linux?
 
If you want to wipe the disk and start over, sure. Each hard drive company has a utility to do this for their respective drives. But, be careful. If you have a system that came with everything pre-loaded, or a Compaq/HP system, it's best to use the recovery disks, since there may be bios/system information written to the hard drive in a hidden partition.
 
The other question is, what are the symptoms that you are having, before you take such a drastic step, if this is what you want to do?

I intend to wipeover and start again. Because i reinstall windows xp rather often and i just delete the partitions using the win xp install disc and i have heard that this causes fragments of windows files to be left over. Can u pls tell me where i can find the utility to wipe my hard disc? I'm using a Maxtor hard drive. I went to the maxtor web-site but couldn't find anything.

Tha MaxBlast software can be found at the following link;
 
http://www.maxtor.com/en/support/downloads/maxblast3.htm

Thanks a million.