Did more research about this issue and found a solution. In Secure Boot I change Secure Boot Mode from Deployed Mode to Audit Mode, then disabled Secure Boot and was able to reboot laptop so it's booting off thumb drive. Fresh install is finally happening. Thanks for your help community!
[IMAGE]   [IMAGE]   So while doing a factory reset on M17 R2 using my Alienware's built-in SupportAssist OS Recovery program, it stopped the process halfway through without even giving a reason and it wasn't my Ethernet connection suddenly going out either. After trying to restart the process all over again, now the S.A. OS Recovery program is gone. Apparently everything else on my drive is too... because now when I reboot my laptop it goes right into SupportAssist | Pre-Boot System Performance Check, then I get a notice saying NO BOOTABLE DEVICES WERE FOUND! POSSIBLE CAUSES COULD BE A CORRUPT OS IMAGE OR A BOOT DEVICE IS NOT ENABLED IN BIOS SETUP. and just has a SHUTDOWN option. For the record, I'm not some pro when it comes to PC's but I'm not a noob either. But this is insane because my laptop was working fine prior to doing this factory reset. I've never used SupportAssist OS Recovery because I've always done clean Windows installs when I get a different gaming laptop. But I trusted this built-in Dell OS Recovery to make it easier and ONLY so I could backup pictures I had in my files along the way and it failed me miserably!!! I can't even do a fresh Windows 10 install on this thing, which at this point is what I'd prefer doing. Can someone please help me get my laptop working again? I'd really appreciate it. 
m17 R2, SA OS Recovery stopped halfway through factory reset