The "with Bing" is the issue. That's a custom SKU/version. Your OEM key will only get used automatically if you install the Windows 8.x Single language with Bing edition. Which is very hard to find. It's not listed on MSDN, and not included in the Media Creation Tool downloads. That's why Microsoft is saying get it from the OEM, AKA the laptop manufacturer. As far as I know retail Disks will read and use 8.x keys and 8.x Pro keys. They will not use the SL keys or SL with Bing keys. The Media Creation Tool will let you download the SL edition but not the SL with Bing. I do believe the SL with Bing is only offered on inexpensive devices with small screens. Only the OEM's get to install that version. If you do buy a disk from HP etc, check to see if its branded, when you use it. What I mean is, is it full of HP logo's etc. Open the system page and see if there is an HP logo there, and if the Support web Site etc is listed on that page. If it is they have added custom OEM info to the disk. there should be a $OEM$ folder in the sources folder. Delete that $OEM$ folder and it should kill all the OEM branding. Then that image can be used on any PC. The OEM key in the BIOS will still be used so no activation issues there. Test it out and see, if it works it will save you having to find multiple images for each manufacturer. I do it in reverse. I add an #OEM$ folder to my install images and customize it for each PC I own. I add the OEM logo and some system info for the system page. I also add a PID.txt file with my product code for that PC. The PID.txt file also lets me bypass the OEM key and install 8.1 Pro.