M17x .. Major failings

Can anyone advise?
Very frustrated.. My M17x is just over a year old and is blue screening ever since I installed with the Windows 7 update.

Dell are providing "hardware support" but will not standover the software..
Since the inital crash, I have lost Wireless capability, the screen resolution has dropped off slightly, and the some of the keys have malfunctioned.

  The  motherboard  was changed as was the   keyboard and the wireless network card..

We have since that attempted a number of recoveries and yesterday reinstalled the operating system..

Everything was fine until I reinstalled 83 "important" or "recommended" Windows updates.

Are M17x Alienware machines experiencing the same issues and are there any fixes? ..
Please help. Would like to to hear back (before the blue screen event )