Game failed to load (FS) DVD Version

I now have fresh Win 10 on ssd.
Assuming Xbox app says “owned”, what is the definitive reinstall FS, please?
I have DVDs, but if I can download update files, that would seem more sensible!!!
Thanks, everybody-this is the most convoluted reinstall ever!
Did I see “keep disk 1 in the drive” somwhere???

Update!

Left new correct Win 10 pc running overnight to see if download progressed…

in morning-power light on, hd no activity-would not wake up!!!

shutdown, would not reboot

fan spins a second, stops (motherboard ROG STRIX Z490-F) (Q leds-behind memory-checks boot yellow/green: vga white:dram yellow: cpu red If all correct-no leds!)

clear bios, check power supply (all positive), strip out everything, unplug and re plug every connector

remove all drives

still will not boot to bios

take out video card ;use basic working PCIe card

boots up!!!

re plug drives

clear bios

reinstall all motherboard drivers

install new video card Radeon RX570 (luckily I had a brand new one)

checkdisk ssd C:

hallelujah!!!

Go to Microsoft store-search MSFS, owned-install

digital ownership first

MSFS next

all uploading (less than an hour)

MSFS now appears in menu

drag icon to desktop-launch

Hallelujah again!!

Syncs

update

playable!!!

Thanks to y’all for your help

The 25 digit slip comes with the DVDs-lost in the depths of my cockpit…!

New update:
FS was downloding the big update-pc crashed and blank screen-power light on, no hd light!!!
Have I got a component failure (psu, graphics card/motherboard) or an overheating problem??? Duh-back to start-do not pass go…

Solved!!!
The posh Corsair RM850 psu tested correct this morning-all rails correct!
but this afternoon-failed to boot-half the rails defunct!
Trying a used-good at £87 first, rather than another £200
Download “open hardware monitor” for running checks on voltage, cpu etc!!!