My suggestion would be to go into BIOS Setup, and in Boot Options; change the first boot device to CDROM.Computer off. (Press the Power On button in for a count of 10 seconds, or until computer turns off)AS SOON AS you press the Power On button, start tapping on the F10 key.Tap in 2 second intervals.If you hear beeps ignore them. They are Stuck Key Error Code beeps, and it is You that is doing it. (It's OK)Takes a few seconds, then you should be looking at the Main menu, in BIOS Setup,System InformationStandard CMOS SetupAdvanced BIOS FeaturesAdvanced Chipset FeaturesIntegrated PeripheralsPower Management SetupPnP/PCI ConfigurationPC Health StatusLoad Optimized DefaultsSupervisor PasswordSet User PasswordSave and Exit SetupExit Without SavingYou CANNOT use your mouse anymore. You need to use the Keyboard.Use the Down Arrow key, and highlight Advanced BIOS Features.Press the Enter key.First Boot DeviceSecond Boot DeviceThird Boot DeviceFourth Boot DeviceYou want CDROM as the First Boot Device.This FORCES the computer to boot off of a disk in the optical drive.(CD/DVD drive)So you will want Optical Drive as the first boot device.BIOS Setup changes. There are different versions. The manual is unclear, of how to move Optical Drive to the top of the list, or also can be said as move to First Boot Device.Let's see if this method is used;Use the Down Arrow key, and highlight -> First Boot DeviceNow press the Enter key.Use the Down Arrow to highlight Optical Drive.Press the Enter key.Now look at the navigation guide at the bottom. (Does NOT state navigation guide)Use the appropriate keys to Change Value.It should either be the + / - keys, or the Page Up/Page Down keys.(If you can, I would use the Minus { - } key, and not use the Plus{ + } key )Tap the key until Optical Drive is at the top of the list, or across from First Boot Device.Press the Enter key.Now use the Up or Down Arrow key to highlight -> Save and Exit, and press the Enter key.Don't have your Restoration Disk in the optical drive?That's OK. Open the drive, put it in.Now press the CTRL, ALT, and DELete keys AT THE SAME TIME.This will restart the computer.For additional questions please post in a Comment.Regards,joecoolvetteHP Support > Service Reference Guide > HP Compaq DX2200 MT Desktop PC,
http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/c00631987/c00631987.pdf