More chances of messing up of booting process by way of windows OS on one hdd cross-referencing to system partition on other hdd.and what would be the outcome if i keep the 1st HDD connected while installing windows 10 v 1803 on the 2ndary HDD?
will it create a dual boot menu that allows us to choose which version of win 10 we would like to boot with during startup?
It looks like he is not even getting display, it would be not possible to do anything in this case.Were you able to check if its getting detected in Bios under boot options/order?
Check if you are able to get into bios and that pendrive is getting detected. If not, the method used to make it bootable must be changed from MBR to UEFI.The servicecentre accesibility is difficult now bcoz of covid...should i reattempt booting using rufus ...a friend bootable.d the usb for me
Never heard of a windows 10 update corrupting the bios. At most, the partitions in storage are lost.It looks like he is not even getting display, it would be not possible to do anything in this case.
Hardware issue seems to be most likely. If it is anything to do with Windows or hard disk, he should at least see BIOS screen.