New Install Boot Failing - RaspberryPi5 & Windows [Resolved]

I’ve just purchased a RaspberryPi5, with a view to installing HA on it - upgrading from an old RaspberryPi1!

I’m using the RaspberryPi Imager, selecting the latest version of HA (13.2) and imaging the SD card.

I install the card, boot up the RaspberryPi - initially the LED flashes green, but after a few seconds it goes red, with a blank screen.

I believe this is because I’m installing it from Windows, and it may be a long standing bug (maybe)… can anyone suggest a way forward? I don’t have another PC/Laptop I can image from, only Windows I’m afraid.

Thanks

Turns out it was the power-supply. I wasn’t using the supplied one!

Resolved!