How Do I Reboot My computer to factory settings?

Ok first put in the disk labeled Operating Systems CD.

Start machine (power on) then hold F12 key
You should get a boot from menu.
Select boot from "CD" *might not be exact text
And then proceed with windows installation.

If no screen comes up while holding F12 you will have to go into setup and define your boot sequence to point to CD first.

Good luck

If you could give us some more information on what's wrong, as a reinstallation may not be necessary.

A direct installation may not be any good, if your having trouble with viruses/adaware etc, a format may be needed.

It does not sound like you have a Recovery CD. But you should have a recovery partition. During the Boot, it should give you a key to press to enter the Recovery partition. Try that.

If it doesn't work, Go to HP.Com and click on the Supprt link. Even thouygh not under warranty, you can get e-mail support.

Because you have a disk labeled "Operating Systems CD", it is unlikely that you have a recovery partition. Nevetheless, it is possible. A lot of manufacturers are including them. If you have one, you will be able to restore it to its factory-fresh state. Nevertheless, remember that there can be a lot of crapware in the factory-fresh state. If you do restore this type of partition, I suggest you go to Add/Remove programs and remove everything you don't want before you install new software.

When you do a Windows installation, you should not "repair" or overwrite Windows. In fact, you should delete the entire hard drive (its partition) and create a new partition. This will let you do a completely virgin install. This is done from the Operating System CD.

Also, you should consider getting into the BIOS and setting that to its defaults.

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However, johndoe99 is quite correct that an entire reinstall may not be necessary.