My computer is 800mmx Pentium 111 laptop. I upgraded to windows xp. Memory ram 384 No problems no error message. My computer started to malfunction, batteries wouldnt hold charge telephony stopped working, system files randomly go missing. Also the hard drive makes a grinding noise and sometimes the serial port does not work.There are no viruses. I sent it to Phillips Priority1 warranty service and they said there is a compatibility problem with xp. I ran all the diagnostics etc and no problems there. No conflicts in services etc. Checked auto exec bat and win inis again no issues.Phillips also told me xp only works on pentium 4. They told me you can only have one internet provider or a dsl line and that you can overheat your computer by using it too much. How can I combat this they have held my computer hostage for three weeks now and I am supposed to have on site or 48 hour turn around time. If any one can help Please I am desparate thanks!