I have moved this to its own thread. I asked the other Rockstars if they have any other ideas. RoHe suggested to disable Windows 8 Secure Boot if you have it enabled.
Hi Phillip  I first want to thank you for such great info you posted here. I have a XPS15 L521x that comes with a 750gb HDD + a 32gb SSD for caching. I upgraded to w8 via the simple up grader downloaded from Microsoft website. The laptop starts the way it came: with BIOS. As I didn't a clean install, Never changed it to make it start in UEFI mode. Now my problem is that w8 after 2 weeks simply gave up and does not start. It only loads a blue screen named "recovery" showing error 0x0000001. It suggest to make a recovery using the DVD but here is when my knowledge is not enough to make the recovery work.  I successfully make the DVD boot but the recovery program cannot find the OS or the HDD to start the recovery. I guess it might be because the Intel SRT and the dual disk arrangement.  Would you please suggest a way to make the recovery program work?  I am not very happy with w8 and I just want to put w7 back (I have the original dell DVDs and my 4 dvds backup) If it is not possible to recover w8, how shall I use my w7 disk to install it back (to then restore the image disks I made before installing w8). Should I change the machine to AHCI for that? I have posted this questions in more than one forums and unfortunately no one could help (even chatting with dell has benn a pain as they replay as if they were robots). Any help will be appreciated.
XPS15 L521x Windows 8 Boot Problem