Update: 02-11-2012 - The BSODs re-appeared and after one crash in particular I couldn't get my laptop to the Windows desktop.
I fitted a spare Kingston SSD (the XPS17 has two HDD slots), made it the boot drive in the BIOS and installed Windows 7 Ultimate afresh (to rule out the original Samsung SSD).
Almost straight away - with a completely fresh install to a different SSD - I started to get BSODs, lots of them, so I persisted with rebooting and taking small steps forward to the point where I could install Dell's recommended drivers. That helped and the regularity of the BSODs decreased, but they were still happening at the rate of three or four per evening and making the laptop difficult to use.
I was on the verge of calling Dell support when I noticed Windows 8 was available at a large discount so took a punt to see if Windows 8 would solve the problem and bought the upgrade.
Installed it this morning and hey presto, no more BSODs.
This leads me to conclude that all of my BSOD problems have been the result of a corrupt Windows 7 installation disc.
I've had Windows 8 running on the laptop all day and it has performed flawlessley and at double the speed it did before so I think this is re-solved, but with a different solution (and a different cause by the look of it!!).
Just wanted to post a follow-up and explain that it wasn't the laptop but the software that was the problem.
Cheers,
Shaun
