You may want to check for spyware, viruses, or just roll back your system to before this was happening. You can do this (Win XP) by going to Start > All Programs > Accessories > System Tools > System Restore. From there select the "Restore my computer to an earlier time". After that, select a bold date in which your computer was working fine and select the "System Checkpoint" in the list. Then click next and follow the instructions.
Hope you get it to work. Also, what motherboard do you have and what are the beeps like? (1 long 1 short, 1 short, etc) If the above stuff worked don't worry about telling anything about the motherboard.
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