want to switch to GPT, H270m Pro4 is resisting

Since building/purchasing this machine last spring. It's been merrily running rings around all the other computers in the house. due to an ID-10-T error due to hypocaffeine levels I committed a pebcak error and wiped my hard drive.

Since I have to start over again anyway. I am investigating converting the machine to GPT provisioning in order to have as many partitions as I need for Win10 and Linux distro testing purposes. Thus far, the H270M Pro 4 fails to recognize the LiveUSB with the GPT version of Win10. I have no cd/dvd drive installed. Here is my last working specs on my build.


$ inxi -Fz
System:    Host: antec Kernel: 4.13.0-32-generic x86_64 (64 bit) Desktop: N/A
           Distro: Peppermint Eight
Machine:   Mobo: ASRock model: H270M Pro4
           Bios: American Megatrends v: P1.10 date: 11/14/2016
CPU:       Quad core Intel Core i7-7700 (-HT-MCP-) cache: 8192 KB
           clock speeds: max: 4200 MHz 1: 3600 MHz 2: 3600 MHz 3: 3600 MHz
           4: 3600 MHz 5: 3600 MHz 6: 3600 MHz 7: 3600 MHz 8: 3600 MHz
Graphics: Card: Intel HD Graphics 630
           Display Server: X.Org 1.19.5 drivers: (unloaded: fbdev,vesa)
           Resolution: 1920x1080@60.00hz
           GLX Renderer: Mesa DRI Intel Kabylake GT2 GLX Version: 3.0 Mesa 17.0.2
Audio:     Card Intel 200 Series PCH HD Audio driver: snd_hda_intel
           Sound: Advanced Linux Sound Architecture v: k4.13.0-32-generic
Network:   Card: Intel Ethernet Connection (2) I219-V driver: e1000e
           IF: enp0s31f6 state: up speed: 1000 Mbps duplex: full mac: <filter>
Drives:    HDD Total Size: 740.2GB (0.6% used)
           ID-1: /dev/nvme0n1 model: N/A size: 250.1GB
           ID-2: /dev/sda model: PNY_CS1311_240GB size: 240.1GB
           ID-3: /dev/sdb model: WDC_WD5000AACS size: 500.1GB
Partition: ID-1: / size: 20G used: 4.0G (21%) fs: ext4 dev: /dev/nvme0n1p2
           ID-2: /home size: 208G used: 99M (1%) fs: ext4 dev: /dev/nvme0n1p4
           ID-3: /boot size: 1.6G used: 75M (6%) fs: ext4 dev: /dev/nvme0n1p1
RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors:   System Temperatures: cpu: 35.0C mobo: N/A
           Fan Speeds (in rpm): cpu: N/A
Info:      Processes: 227 Uptime: 11 min Memory: 601.2/31873.5MB
           Client: Shell (bash) inxi: 2.2.35


Has anybody successfully switched from MBR to GPT? I'm excited to start the process, but am not gonna rush and leap in, seeing as I have other working machines at the moment. I wanna do this right this time around and take advantage of some of the motherboard's capabilities that I haven't until now.

many thanks for your help in my new journey,
seanboy