I have a hp laptop with pIII 800mhz. I am running a windows xp upgrade from ME. I have reloaded this system 3 times now. The first time...I had a computer shop do it and they said that it had a virus that couldn't be cleaned. The next two times i ended up reloading it myself to save money. About six months ago the computer took a fall onto asphalt....no physical damage. Could that fall have caused internal problems in the HD and cause my computer to lock up when it reaches the bad spot? I also have norton internet security as I am using cable for my internet. This problem really has me confused.