Which model of Dell with service tag number if appropriate AND is it the original installation.
Most Dells, came with either Recovery Disc or a Recovery Partition.
Either of these allow Recovery to the state the computer was in when it was sold by Dell.
However to use that you would lose all your software installed since and all your personal data.
That is known as a destructive recovery.
Some Dells came with a Soft or Non-Destructive Recovery which in effect is a repair installation of Windows.
The same result can be achieved with an XP CD. However caution is necessary with OEM installations, that is Original Equipment Maufacturer - ie: Dell as their Windows installations cannot always be repaired using Recovery Console from the standard XP CD.
The easiest way is to create a Backup on an external Hard drive using the built in backup on XP Pro. this has the advantage that an ASR floppy can be created which will allow you to recover, if Windows cannot be started.
Edited by Macboatmaster, 17 August 2010 - 04:46 PM.