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Windows 8 and 7 on Separate Drives Requires Registry Edit?

techimnot

New Member
Hello, new here, first post.
The truth is here somewhere, HELP!
Windows 7 home Premium
HP p6320y
AMD Phenom II X4 820 2.8GHz
8GB RAM
Radeon HD 4670

I installed Windows 8 on a separate drive and for me to get it to boot I need to change to IDE in the bios. If I want to go back to Windows 7 I need to go to msconfig and change my default OS to Win7 before I leave Win8 and restart. I then need to enter BIOS and change back to AHCI.

While running Win7 in the Registry Editor under System/CurrentControlSet/services I have a
amdide
amdsata
msahci


While running Win8 in the Registry Editor under System/CurrentControlSet/services I have a
amdsata

and not the other two.

Does anyone one know if these values can be added with maybe a hot fix to the win8 registry? And if so would that allow win8 and win 7 to run in ACHI setting? Or would I be left with a smoking conversation piece?

I found this Mr Fixit, but would like a nudge from someone knowledgeable before trying.

Would this Mr fixit do it? Microsoft Fix it 50470
Error message occurs after you change the SATA mode of the boot drive
 

My Computer

System One

  • OS
    Win7
    System Manufacturer/Model
    HP p6320y
    CPU
    AMD Phenom II X4 820
    Motherboard
    Pegatron Violet 6
    Memory
    DDR3 8M
    Graphics Card(s)
    Radeon HD 4670

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