I have the same system (MSI GX60 with A10-class APU with 7660G integrated graphics and 7970M discreet GPU) originally running w8, but upgraded to w10.
Recently windows update "broke" my driver and my discrete GPU was disabled with error 43 and more info said it needed further installation.
After a TON of frustration I learned that Windows Update had broken the driver and that I needed to roll back to an older version.
There may be different ways to do it, but after much tribulation I ended up succeeding after:
1. Completely wiping all drivers from the system with dduninstaller from guru3d.com. Requires booting into safemode, which can be done with msconfig.
2. Using tool downloaded from microsoft to prevent computer from updating the display driver again (https://support.microsoft.com/en-us/kb/3073930?utm_source=twitter )
3. Installing an older driver. (I used the latest legacy WHQL driver, which is quite old, but it works for me. A newer version might work, but I went for the whql-driver). BTW: You need the driver for the APU, NOT the Discrete part. I messed up a lot in this regard.
I didn't have the exact same problem as you (as I only use one screen) but considering the timing and that we have probably exactly the same hardware I assume the solution is the same.
Hope this works for you.
I know your post is quite old now but would so kind as to tell me where i could download these said drivers ? because on the AMD website there are no differences between drivers for APU / for GPU in their old drivers section
I am struggling with this too. I have an old version of the display drivers which came with the laptop - I have kept a copy of the latest drivers to work and guard them with my life. Windows 10 keeps trying to update to a new build which these drivers are not compatible with and I repeatedly have to "roll back" in order to have a functional laptop.
The most recent hurdle is that windows 10 now insists upon updating every time I turn the laptop off and have had to resort to disabling windows update. If anyone knows a better way, I am all ears!!
I have a Msi GX60 1AC
I can confirm the latest working drivers with the Switchable graphics working is Radeon Version Software 16.2.1
I downloaded and tried every combination. Even installing the graphics drivers for the On board and Dedicated separately.
After may tries and errors I ave bench-marked this driver as the best and most recent working driver for our configuration.
As always to get the 7970m working you need to set all settings in ATI software to top performance.
I was able to finish Nioh, Battelfield 1 and even try Call o Duty WW2. lol knew it needed more CPU and VRAM.
I regularly play Battlefield 4 online with this driver.
AMD Radeon HD 7660G + AMD Radeon HD 7970M
Windows 8.1 (also working on Win 7)
Hope this helps.