iReboot still doesn't recognize the other windows installation, photo added. EasyBCD is not free

@Mark It's free for personal use, you have to register to download it. Have you done bootrec /scanos for both disks? Maybe iReboot is using the wrong one...

Well check the picture I've uploaded. One of the ssd in on a pcie slot, does it change something?

That shouldn't matter. The screenshot only shows that bootrec detected two Windows installations, that's good - but my suspicion is that you have two BCD stores. Bootrec added second entry to one store only and you have to repeat it for the other one. Oh, do you maybe know if you're booting through EFI or legacy boot/BIOS?

Well, I've done it with my usb key from my retail purchase, but the other windows 7 comes from a ghost(OEM WIndows 7 laptop hhd to samsung evo ssd). I should get a win 7 cd(I have some) and do the bootrec again?

I think it will work with that USB key. Try switching to the other disk like you normally would to boot Windows 7 and boot from USB. This time select Windows 7 (it should show both and let you pick before you can access command line). Be careful not to overwrite your previous BCD backup.

But to access this repair menu I boot on the usb key(win10), and then I don't know what I can do next to select the windows 7 drive

What exactly are you doing in BIOS to boot from the other drive? I'm trying to figure out your current setup.

Wow, I didn't know that stack exchange had a chat. Thx for help.

It could be nice for me if I can have this iReboot program running properly.

I have 3 SSD 1 HHD and DVD

Okay. And if you currently want to boot the other version of Windows, do you also press F8 and select it? Or do you have to do something else?

I also press F8 to select it. The windows 10 is my first priority after dvd so it automatically boot on it unless I press f2 to enter the bios after that I press f8 to chose one on the list

More info:

Well, I have 4 different bootables devices on different type of slot/connection and they have or had different windows intallation on them. I've also used bootable usb dvd, hirent boot... I guess my boot information is fucked up.

Becaus I've installed windows 10 on that other ssd but finally I didnt needed windows 10 there so I've formated it after. Don't worry I'm not crazy, I tried to fix my relatively slow startup 45 seconds caused by my pcie ssd and my motherboard x99

I dont know actually I have this bootsqm.dat and the backup named A on the storage (no windows installation) on it (The last windows 10 installation was on this one, but I formated it after), I dont really understand

My computer always want me to check drive for consistancy also

Those are my drive it may help you