At this point I'd try to boot from Windows 7 USB and run automatic repair, I'm running out of ideas what can be wrong. You can download Windows 7 here and use Rufus to create a bootable USB from ISO

@Mark

I'll use the dvd that I already have

Thank you very much for you help so far. With this BCD knowledge I have now, I think I'll find an anwser to my question. I awarded you a 50 reputations bounty that's the least of what I can do.

@gronostaj

@Mark thank you. I'm not really satisfied that we didn't get it fixed completely, but that's some progress. You could try do disable signature check in Windows 7 - it's discouraged, but could let you boot (it's a feature intended for driver developers, it allows for unsigned drivers which may be dangerous). EasyBCD has a checkbox for that on Advanced Settings / Advanced tab. You may also want to ask another question on SuperUser, maybe someone more knowledgeable will be able to help you.

Okay, I'll notify you when I'll fix the problem

@gronostaj I've put the windows 7 ssd on a old laptop, auto-repair from a win 7 cd, and it works on the laptop. I took the hdd from that laptop and put it in my computer, I got the winload.efi problem again