New motherboard, won't boot!

[Connor Gardner]

Hello! I'm having a problem with my PC that I just had upgraded, that being my motherboard, CPU, and RAM. This unleashed a problem on my computer. I upgraded my mobo from a H81S HDM to an MSI Z270-A Pro. I have my Windows 10 OS on my SSD and 2 HDD Hard Drives. Now, when I boot my SSD, I get a black screen message telling me it couldn't find the boot data. Booting from a different drive starts the automatic repair, ending in no solution, not allowing me to reset or anything. So without options, I made a USB boot drive installation for Win 10, but now it's telling me I can't install onto any of my hard drives because of the partition style. I'm now kind of at a dead end, unsure of what to do. Any help would be fantastic, thanks!

 

[Paul NZ]

Do a clean install. You cant use a hdd with an OS on it from something else

And expect it to work. it wont

Enable UEFI,AHCI.and secureboot if you're installing 64 bit. Save settings then boot from the flash drive

If you get to setup delete all partitions.

Did you get the ISO with the mediacreation tool?

 

[Connor Gardner]

I'm sorry, I meant I had Windows 10 on my SSD, and I had two other HDDs for storage purposes, without OS on them. I had UEFI, AHCI, but I don't know if I had secureboot on. I was going to try to install the new OS on a small HDD I had, which I formatted. It also told me it had an MBR partition table, and Windows can only be installed on GBT disks. I'll try deleting all the partitions on the drive and see if that works. Sorry for the confusion!