How to recover my computer to factory settings

You can do this with any operating system disk for Windows XP or 7 I would not recommend Vista although folks swear by it still. Or you can order one from the factory or if you have one for your machine even better. Insert disk into the drive making sure that your first boot is DVD or CD whichever you have installed on your tower computer. If the computer is not booting from the disk first you will have to go to BIOS and set it to boot order CD or DVD first HDD second boot. F10 save settings reboot.
Once you have completed that process of boot order. Some machine will show you Hit delete or F1 to go to BIOS or setup. Follow the onscreen instructions as to what the information that comes up when the program is loading. That is about it really to restore to factory settings. John