Replaced motherboard and CPU, windows 8.1 won't boot.

Oct 1, 2015
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4,510
Hello guys! I really need your help!

First I will describe my exact setup: I have a 2TB HDD on which Windows 7 is installed, and an SSD on which Windows 8.1 is installed (Main OS I have been using recently). I dual boot and both drives have a single partition.

My old motherboard - an ASUS M4A89TD PRO - completely died last week. I replaced it but I wanted to move to Intel, so I also bought a CPU. I replaced that motherboard and my old AMD Athlon X4 640 for an ASRock Fatal1ity H97 Killer motherboard and an i7 4790 (non-K) processor. Such a huge change in hardware naturally caused Windows 8.1 to fail to boot.

I would rather not perform a clean installation of Windows. I could not uninstall drivers or backup data due to it being an unexpected event - the mobo died randomly. I certainly could use a SATA-USB cable to transfer/backup files but it would generate a lot of trouble. I have the flash drive with which I installed Windows 8.1.

What are my options to make my machine work, without formatting? If that's really not possible, is it possible to at least create a second partition on either my HDD or SSD in order to transfer the files, then delete the old partitions and keep the new OS?

EDIT: I read that by changing BIOS storage settings from AHCI to IDE you can get Windows to boot, then you can remove old drivers, install new drivers and change settings back and it will do just fine. If that does work, would I have any performance issues that would warrant a fresh install on a new partition instead of keeping it as it is?

Thank you.
 

BSOD BSTD

Honorable
Nov 21, 2013
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11,660
Not what you want to hear, but you really should do a clean install of windows after a change of motherboard (CPU is ok, you can just change them out and swap out), but the old mobo drivers will conflict badly with the new mobo.

If you have space on your HDD then a partition will work fine, chuck all your personal files onto the fresh partition, format the old partition and clean install windows onto it, then merge them, voila.

Also make sure to download the new motherboard drivers from the asrock site.
 
Oct 1, 2015
2
0
4,510


I understand that the old drivers cause conflict, but what if I boot into safe mode, or change BIOS settings in order to just boot, and then manually clean the old drivers and replace them with new ones, would it provide me with an OK installation? or even if I do that I won't have the same performance I would with a clean install/new partition?

Thanks!