| Before you do anything, check and make sure there is not a floppy disk or cd in your CD or CDRW, if there is, most all computers won't boot up.
If that doesn't work, go into your BIOS and change your boot up from FLOPPY to CD Rom, click F-10 to save changes, then turn off your computer and turn it back on, if it still doesn't boot, go back to BIOS and change back to FLOPPY boot up. As the other persons advised you, that way can do harm to your PC, another problem can be your little 3220 BIOS battery, the chrome battery about the size of a quator, turn off the PC, unplug it from the power, remove the BIOS battery, turn on the PC, after you turn it on and is on just for a mnute or so,turn it off and replace the battery back in place, the + should be facing you. If none of these things work, then you try and unplug the CD Rom first after you turn off your PC, restar your PC to see if it reboots, if not, hook your CD Rom back up and do the same thing with the Floppy drive, unhook and restart each piece of equipment on your PC, also do the same with a dialup modem if you have one. If all of this fails, you either have a bad Hard Drive or the PC needs to be reformatted. | 
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