If you computer was home made and a windows install
disk was used you will need to find the disk.
If you cannot find the disk then you may be out of luck
and will most likely need to purchase windows once again.
This is why it is a good idea to make sure you backup
your windows disk and use it as a windows xp recovery disk.
The reason is because Microsoft is not going to just
give you another disk with windows on it free of charge.
If you do not have a cd burner to make a back up copy
of your windows xp recovery disk, find someone that does.
If you every get a bad virus you will need to recover
windows And doing so will save you a lot of time and aggravation later
on if you do need to use a windows xp recovery disk.