When I make the
- SSD System partition active and HDD hidden+unactive OR
- SSD main partition active and HDD hidden+unactive,
I get the error "can't find element" at fixboot and rebuildbcd.
After that I unhooked the HDD again, I was able to repair the pc using the usb drive.
I hooked on the HDD (still unactive+hidden) and was able to boot to Windows again.
I then shutted down, removed the USB drive and the OS not found error occurred again.
With the USB drive plugged in agian, I got the element not found error again.
The ports in the front are USB 3.0, I now only used USB 2.0 drives.
The BIOS setting "USB 3.0 Controller" still stands on Enabled.
I need to find a DVD to test your other suggestion. May those be RW, or better not so the PC couldn't write boot files on it?
I only have some 700MB CD+R available.