M.2 SSD not being able to boot from it, windows doesn't recognise.

Good morning all

Think this is my first post here, I recently upgraded my pc and I am having trouble installing windows 10 home on an Evo 500gig ssd m.2, the motherboard etc supports the m.2 but when I go into boot drive etc and choose to boot from disk, windows lists my m.2 as a drive, but gives the error "this is not a bootable drive" so my question is how to fix this or bypass the error.

Ps: I have tried the following: On my motherboard clicked the setting to support wodows os, which according to the manual is for win 8 and up.
I did a clean build and install on all parts, all parts are listed and according to motherboard test works.
I tried it with the m.2 gene that the motherboard features, no luck.
After the normal ssd was placed in and the m.2 removed, it installed perfectly, pc running as it should, just slower then I'd like as I can't use my drive I want.
Oh, and I am not sure how to edit my system specs, so the ones listed in my profile is old, heres the new ones:

Intel core i9 7900x, msi gaming pro carbon x299 motherboard, 32gig 2400mhz crucial ram 8x4gigs, corsair 250gig ssd, but this is where I'd like the samsung evo 960 m.2 to be, and if relevant, it's a 970msi gfx, will be replaced.

Thank you, please excuse any stupid mistakes my made hehe

You could try this:
1.Install Macrium Reflect free(using normal SSD and without the NVMe SSD), create a full image backup in an external HDD, create a recovery disk(Rescue media)
2. Remove the normal SSD, install NVMe SSD, boot with the recovery disk created earlier, recover the image from the backup(external HDD)
Creating rescue media - KnowledgeBase v7 - Macrium Reflect Knowledgebase - KnowledgeBase v7 - Macrium Reflect Knowledgebase
v5: How to create a disk image (Backup, Image, v5)

v5: How to restore a backup image (Restore, v5)

Hi essenbe, I actually remember you from an old forum called sevenforums lol, my username was Alsisgevat years ago. But thanx I did update my system specs, and I did go through the manual, however it mearly states that I might need to do a bios flash update, which I never tried as it might go horribly wrong. But thought someone here might know of a quick fix or something I am missing. Thank you for your advice. In the link you provided it speaks of System Configuration WindowsOperating System shall successfully load the driver only when Samsung NVMe SSD 960 PRO, 960 EVO or 950 PRO is installed to PCIe slot directly connected to CPU or M.2 or PCIe slot connected to PCH. However, in the PCH case, Windows Operating System cannot load the driver under following BIOS configurations

where PCH Storage Configuration is set to Raid Mod, or NAND/Storage Remapping option is enabled

And I do remember I had an option on my MSI board that said m.2 gene raid/achi mode. But yeah, not so sure what to do.

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Thanx Brummyfan I will use that assoon as I can install to the drive, will make it allot easier if I don't have to download all the win 10 updates again, I appreciate the answer.

Thank you, no every comment or advise helps, only a fool rejects help, regardless of the weight it carries :). And yeah, still running the watercooling, however these days I see the closed loops you buy as a unit is allot cheaper then custom loops. But thanx, hope someone here has a MSI board that can give me the name of the setting I am missing, I agree it is probably in the bios, as the drive is picked up etc, just cant install to it.

Thanx, I did read the manual, however I will try the MSI Windows 7 Smart Tool and make sure all drives are up to date before starting the process.