|"Tags:Hewlett-packard / 2103"|
That's not the proper model number.
I get two "hits" on the HP site when I search with 2103, for two different Compaq desktop models.
Scroll down a bit.
Look for the similar label on the outside of your computer.
Quote the specific model number - that's at the end of the first line.
Quote the Product number - that's on the third line.
A wireless keyboard may NOT work for pressing F8 while booting.
"....boot into the BIOS (setup) screens and enable legacy USB devices."
That's only if you need to get into the bios Setup with a corded USB keyboard - that or similar, e.g. USB keyboard, may already be Enabled or set to Auto - pressing F8 while booting on a corded USB (or PS/2) keyboard doesn't require that.
A wireless keyboard will probably NOT work for getting into the bios in any case.
A corded keyboard may have a button or key that toggles the Fxx keys on / off - if it has that, a led lights up on the keyboard for that when that's toggled on - it must be on while booting, if you need to press a Fxx key while booting. Also, if it has that, the keys that have Fxx on them usually have other printing on them as well, rather than just Fxx.
An older keyboard I have has a small button for that, I think it had an F on it. .
A newer one I have has a key the same as the others with F Lock printed on it.
Some such keyboards will retain the setting that that button or key was in when you were in Windows, while booting into Windows after that, but some WILL NOT and if it's off while booting you must press the button or key to tioggle it on before you press an Fxx key..
Remove any bootable CDs or DVDs you have in drives. Depending on bios "boot order" or similar settings, the bios may boot the computer from the disk when you press the F8 key, e.g. when the line appears "Press any key to boot fron CD" or similar.
Press the F8 key repeatedly while booting, don't hold down the key, starting very early in the boot sequence, or starting when the led on the monitor turns the color it normally is when the computer has video.
If you don't get the Windows loading choices menu ("Windows Advanced Options Menu" in XP)....
The bios version on some retail mboards in generic systems and on mboards on many brand name system computers may have a use for pressing the F8 key while booting - e.g. a menu pops up and you're supposed to select a device to boot the computer from.
If you see that, READ the screen and press the key that exits the screen, e.g. Esc, then immediately repeatedly press the F8 key, and you should then see the Windows boot choices menu.
If you're STILL not seeing the Windows loading choices menu ("Windows Advanced Options Menu" in XP), you see an Windows error messsage on a blue screen instead, then you must at least run CHKDSK ...
See response 4 in this,
" If you DO have video while booting the computer BEFORE Windows is supposed to load, describe what are you seeing.
If Windows is attempting to load but it won't load properly, you probably WILL need a Windows CD of the same family (XP), or possibly one of the same version (Home or Pro) ."
( See the note at the beginning of response 4 there regarding the mis-placed blue underlined words)