My DELL INSPIRON N5010 IS GIVING ME LOTS OF PROBLEMS. i want help!!!?

i purchased dell inspiron N5010 in may 2011 and it is always ready with a new problem.in its first week i had to reinstall all softwares n programmes due to unknown reasons.today suddenly bluetooth disappeared i dont know where!! dell stage applications are not working properly DELL DOCK IS LOST NUMERIC PAD IS NOT WORKING ALONG WITH KEYS F1 F2 ETC. IT TAKES LOT OF TIMES TO START . I ALWAYS UPDATE WITH LATEST UPDATE BUT IT ALWAYS REMAINS IN THIS HORRIBLE STATE. I'M FED UP, CAN ANYONE HELP, SUGGEST MEWT HAS HAPPENED TO IT.