What model do you have ?
Which same problem ?
Are you getting the same message as in the first post ?
If you can't get into the bios, if Windows will not load normally, you need to find the Owner's or User's manual for your model on the manufacturer's web site - how to get into the bios Setup is always in that.
If you want to install or re-install Windows.....
Does your netbook model have a built in CD or DVD drive ?
If it doesn't, even if the bios Setup can be set to boot from a USB connected drive, you usually cannot install XP from a USB CD or DVD drive because the files on the CD cannot recognize the USB optical drive model (all you see in that case is a blue screen).
There is a method of installing XP when you can't get the CD to load Windows, if you're interested - it requires that you have access to another working computer and have an inexpensive adapter to connect your drive to the other computer.
You can't run a Repair installation of XP unless you can boot the computer from a CD from in an optical drive connected to the same computer. The above method can only install Windows from scratch. If you have files on the hard drive that you do not want to lose, you will need to copy them to elsewhere first, BEFORE you install Windows again. E.g. Even if the operating system will no longer load normally, there are ways of copying data - e.g. a bootable Linux CD may work fine in a USB optical drive.
If you don't have an XP Re-installation CD that came with the computer ....
You can probably order Recovery disks for your model from somewhere on the brand name's web site, if your model is not more than 5 years old or so, and have them shipped to you within a few days. They are usually relatively inexpensive - much cheaper than buying an OEM XP Home CD, the cheapest type you can buy,
OR if you know anyone who has a regular OEM Microsoft XP CD, of the same version, Home or Pro, as on the official Microsoft label that's on the outside of your case, probably on the bottom, you can use that CD to install Windows along with the Product Key that's on the label.
A regular OEM Microsoft XP CD has "For distribution with a new PC only." printed on it, and holograms on the CD.