It seems that many people cannot - and unfortunately, this post does not talk about a solution, but rather as a heads-up, or a possible point of focus, for people who might have a solution to offer.
But what is the problem?
Well, as far as I understand it (disclaimer: I do *not* own a Dell laptop), Dell laptops come with a version of preinstalled Windows Vista or Windows 7 on them which has some funky partition mapping on the drive, as well as some disabled features.
For various reasons, there comes a time when users will want to turn the Data Execution Prevention feature off, by opening a Command Prompt Window and entering "bcdedit /set nx AlwaysOff". (This helps run applications that were developed before Vista was available which otherwise trip the DEP flags and crash on the user - some of them being Microsoft's own Flight Simulator series, FS2004 and FSX).
The command can be successfully executed (with administrator rights or elevated privileges), but when the user reboots (sometimes MUCH later on), they are faced with an error 0x7b and a Blue Screen of death (BSOD).
So far, the ONLY reports we have are coming from users with Dell laptops who have NOT scrapped the Dell-provided Windows installations.
The obvious workaround is for these users to FORMAT their drives and install a clean NEW version of Windows (preferably, Windows 7 x64 now), that does NOT come from the Dell-provided disks.
All attempts at contacting Dell about this problem have been met with no success for the moment.
So... do YOU have a solution for this problem? If so, and you are STILL running your Dell laptop with the original, Dell-installed Windows and you were able to turn DEP AlwaysOff, I'm prepared to offer you a free Concorde-X license as a thank-you for sharing that information with me :).