Windows 10 - cannot perform clean install

[aqol45]

Hi all

Trying to perform clean install on an old windows 10 pc as stuck in 'preparing automatic repair' loop

I have added a version of win10 on to a USB stick using rufus

I have changed boot order in bios (on ASUS M5A78L) to make USB priority - just reverts back to 'preparing automatic repair'
Hit f8 for boot menu - selected USB > 'press any key to load USB' again just reverts back to 'preparing automatic repair'

I have unplugged SSD drive - i can then at least bypass the 'repair' issue & start the process on loading win10
HOWEVER when i plug SSD drive back in, it states drive is not recognised in BOIS when asked where i want to save ...argghhhhhh

Any thoughts

 

[aqol45]

So have created another install file using Media Creation Tool - exact same result !!! Boots again to SDD drive & not USB stick

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Any further ideas??