ehm I have to add something ... this time I turned on everything in system agent except for ITBT root port and iTBT PCIe on Extra Segment ... because I still had an error or two in dmesg mmconfig something and something else i cant remember. Now all errors are gone. I mean really ALL errors ;-)
I forgot to set the VM to uefi ... and then I converted the qcow2 to img with qemu-img convert -f ..raw... -O etc ... funny however now my lg gram 2020 hung on shutdown again as it did before in linux ;-)
:`(
at least I can now boot into win10 from usb
So I installed win10 in virt-manager with qemu/libvirt and somewhere I selected "raw" that gave me an .img file then I dded this file to a thumbdrive but it won't boot ...
/dev/sda1 * 2048 104447 102400 50M 7 HPFS/NTFS/exFAT
/dev/sda2 104448 26191349 26086902 12,4G 7...
I can't stop tweaking the bios :) Set "Enable the iTBT PCIe on Extra Segment" inside the TCSS xHCI thing to ENABLE and that finally fixes the hang problem !!!