First of all, I'm really sorry for my bad English. I'll try being as clear as possible.
mobo: MSI Z97 MPOWER MAX AC
cpu: i7 4790k
gpu: AMD Radeon HD 7950 (GIGABYTE version)
ssd1: samsung evo
What was happened?
I had installed windows 10 on Corsair SSD and used it without any problem, with fastboot enabled and UEFI. Then I could not use my PC for 3 months. 3 Days ago I finally turned it on again and it won't boot. After the MSI logo, it bore me in the EFI shell (something like this: http://i50.tinypic.com/k175ep.jpg
). I thought that was a problem of my installed win 10 edu edition, then I created the usb key with cmd (always used that method and never got errors) and reinstalled it. It was installed in Legacy mode, then no fastboot option available (fastboot is available only in UEFI mode).
Steps I tried:
1) Reset to settings of the BIOS -> Windows 10 installed in Legacy mode
2) Forced the UEFI mode -> USB key not booting
3) created usb key with refuse, cmd in ntfs and fat32, mbr and gpt. Nothing useful.
The BIOS sees the usb key as UEFI device, however, if I boot in it directly from the BIOS, the screen become black for a sec and then it brings me again in the BIOS, if I restart the system, it brings me to EFI shell
4) cleaned the two ssds (I've other hard disk), formatted in ntfs with gpt and tried again, same situation:
- with legacy + uefi, windows 10 is installed in legacy
- with uefi, black screen and BIOS
5) updated BIOS at latest version
6) disconnected every peripherals
7) disconnected every other HDDs and changed the SATA port of the SSD
8) contacted the call center of MSI and... "Try to control the boot order" (yes, I had already checked, like 100 times)
9) turned on and off the windows 10 features of MSI during installation and in post installation. In post installation -> EFI shell, in pre installation it forces the UEFI, then black screen and BIOS
10) tried to switch the BIOS of the GPU (the 7950 has a switch between to BIOS), because... how knows....
11) tried the second (and out of date) BIOS of MSI
12) updated another time the BIOS as suggested by the customer center of MSI
13) discharge the mobo with the button that MSI provides
Yes I've used USB 2.0.
Now I thought that the only thing I have changed is the mouse, but is a Razer Ouroboros mouse that works perfectly. I don't think is that the problem (I'll try as soon I've another mouse)
I think that is a problem of the mobo, because Windows should have started the first time, and also all the usb key that I've created. But I don't think is an hardware problem, since is just a UEFI problem. Also an error with the BIOS is improbable, because I've switched it. I have no more ideas. Please, suggest me something.
Thank you very much
LITTLE UPDATE: tried to boot without keyboard and mouse, EFI mode again!