The problem is the laptop (specs in signature) not rig in system specs. Sometimes when I switch it on, Vista loads normally. Other times, just after the horizontal 'loading' bars and before the Vista orb appears, I get a BSOD of Nvlddmkm.sys or Nvlddmkm.dll then the laptop reboots, BSOD's, reboots... it can happen like 5 times! I've been googling all morning but apparently there's no solution to this? It does the BSOD only during startup. Once Vista loads, it never BSODs not even during a game.