Re: 730 XPS ShutDowns
I can also confirm that a reformat and reinstall of Windows did not resolve the problems my XPS 730 H2C was having, but I also have to admit that I didn't even bother to try until Dell had agreed to send a replacement system. I realized at the time that I should have tried it sooner.
I do have to admit, though, that the new system (now a 730X rather than the former 730) is still running strong - though it is only one week old. My 730 was prone to many BSODs (usually IRQ_NOT_LESS_OR_EQUAL), even in its first week - but not a single BSOD from the 730X, so far. Of course, my 730 didn't start refusing to boot until few weeks later, so I'm still a little paranoid - but so far, so good.