I am all set up for Windows 7 on my new HP Spectre, but I can't find the NVMe driver for Toshiba XG5 1TB SSD that's inside this laptop. Thus, I am not able to get the Win 7 installer to recognize the SSD. I was able to get the whole process working on the exact same computer, but which has a Samsung SSD, so I know it can be done. Anyone know where I can find it?

I tried to add the NVMe hotfix from Microsoft to the install.wim, and I tried the drivers https://h30434.www3.hp.com/t5/Notebook-H...rs/td-p/5782017 and Recommended AHCI/RAID and NVMe Drivers. No luck. Any advice would be incredibly appreciated! Long live Win 7!

SSD HWID's:
SCSI\DiskNVMe____KXG50ZNV1T02_TOS4102
SCSI\DiskNVMe____KXG50ZNV1T02_TOS
SCSI\DiskNVMe____
SCSI\NVMe____KXG50ZNV1T02_TOS4
NVMe____KXG50ZNV1T02_TOS4
GenDisk

NVMe Controller HWID's:
PCI\VEN_1179&DEV_0116&SUBSYS_00011179&REV_00
PCI\VEN_1179&DEV_0116&SUBSYS_00011179
PCI\VEN_1179&DEV_0116&CC_010802
PCI\VEN_1179&DEV_0116&CC_0108


EDIT:
I see the issue might not be the XG5, but the fact that the "modded" drivers found on this forum cannot be loaded without being signed from within the Windows 7 Installer. Looking for a workaround...

The problem is not the modded drivers, it is the fact they are not signed. From within the bootable Windows 7 installer, go to Repair windows installation, and there's an advanced recovery option. Then there is an option to load drivers from within there. It will open up an explorer-type window that allows you to specifically click the .inf file from the modded drivers by Fernano. Then, when you go back to the installer (without restarting), the drives will show up.

Now working on BSOD loop because of the driver signature file...

Thanks for the quick reply @Fernando. I have already integrated the MS NVMe Hotfix, but upon looking closer from within NTLite, it says "Integrated (Install Pending)"

Is there another step I must do to fully integrate the fix?

@Fernando, yes, I already integrated the hotfixes into boot.wim, and install.wim. I integrated them a second time, following the instructions from the hotfix download page, and I also used NTLite to add the modded Toshiba drivers to the Windows 7 installer, but it still does not recognize from within the installer. Additionally, since trying this, now my trick to use the "Repair your computer" -> "Load drivers" option to add the drivers does not work. It now says "The installation has failed." So I have no way to Install Windows all the way.

Are you saying I need to add the Certificate to boot.wim and install.wim too? I'm sorry if this has already been spelled out, but I'm having trouble finding the correct steps here.

When I try to boot, disregarding the signature error, I get " a required file is missing or contains error." on \Windows\system32\winload.efi.

I did not have to do Step 11 from the guide above to get Windows 7 x64 running before. I tried it, but both versions of bootx64.efi were the same (it was already there).

I was able to install the certificate by opening up command prompt, and changing %systemroot% to E:\ (where Windows is installed) from within the Windows 7 installer. However this step does not change the fact that Windows still cannot boot.

The instructions that would be most helpful --- starting with a fresh USB .iso of Windows 7, exactly what steps are needed to load the mod+signed Toshiba/OCZ NVMe driver during Windows 7 installation so that the computer will boot?

I started from scratch just in case something went wrong somewhere along the way. Steps:

1) Create Windows 7 Bootable USB using Rufus
2) Add USB 3.0 Drivers to USB, using this guide: http://codeabitwiser.com/2014/03/how-to-...-usb-3-0-ports/
--- At this stage, mod+signed Toshiba/OCZ NVMe driver can be loaded during Windows 7 install by going to "Repair your computer" -> "Load drivers"
--- Then Windows 7 WILL recognize the Toshbia XG5 SSD
3) Add Hotfixes (486575 and 477475) PLUS mod+signed Toshiba/OCZ drivers to the Win 7 installer, using this guide: https://support.microsoft.com/en-us/help...indows-7-and-wi
--- At this stage, not only is the SSD not found, but the mod+signed Toshiba/OCZ NVMe drive WILL NO LONGER LOAD DURING WINDOWS 7 INSTALLATION using "Repair your computer" -> "Load drivers" = "The installation has failed"
--- Windows 7 will not recognize the SSD with the Hotfix + mod+signed drivers added
???

If I install mod+signed Toshiba/OCZ NVMe driver from Step 2, then install Windows without adding the hotfixes, computer enters error loop on \Windows\system32\winload.efi as driver is not "authentic" and the efi problem I mentioned above. I've been looking at these links:
https://www.wintips.org/how-to-fix-windo...dows-8-7-vista/
http://theoven.org/index.php?topic=1106.0
https://social.technet.microsoft.com/For...w7itprohardware
and wondering if I need to convert to MBR booting to use bcdedit to escape the error on \Windows\system32\winload.efi. I'm fresh out of ideas and have spent all day on this.

Any help would be very much appreciated! I need to get this laptop returned tomorrow so hoping to get it working.

@Fernando there is no way I can find to complete Step 2. With the NVMe Hotfix including the mod+signed drivers, they do not load in the installer, plus the "Repair" load option becomes unavailable.

@fernando, so in the command lines that include "add drivers" what goes in those folders? Nothing?

Step 5 "Copy the driver files to c:\temp\drivers." is intended to be skipped?

Ok, it worked! Win 7 install successful. Thanks a ton.

Interesting note: the modded driver was actually quite confusing in this context. I tried very hard to get it working before/after Win install to no avail. Even with Windows 7 installed, the modded driver results in a crash loop on my XG5. The "pure" driver works fine, selecting RD400 or XG3, once Windows is installed with the Hotfix.