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Forgot to enable AHCI on SSD. Reinstall Windows 7?

post #1 of 11
Thread Starter 
So I forgot to enable AHCI when I was installing Windows 7 on my SSD, and according to some sites I found on Google my performance isn't as good, and my SSD's lifespan will be shorter.

Should I reinstall Windows with AHCI enabled?

This is what I have right now:

dscn0114i.jpg
post #2 of 11
If this is a clean install with nothing on it, then yes, enable AHCI and reinstall.
If you'd rather not reinstall, there is a way you'll get Windows to boot after a little registry tweak... Let me know which so I can hunt down that tweak again... smile.gif
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post #3 of 11
It's usually possible to enable AHCI after the fact, without having to reinstall windows, if you are willing to do a small bit of work.

I know I've see guides on OCN, and else where that describe how to do this in detail.
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post #4 of 11
Here is the guide to switch without re-install.

http://support.microsoft.com/kb/922976
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post #5 of 11
Thread Starter 
Quote:
Originally Posted by Blameless;14657683 
It's usually possible to enable AHCI after the fact, without having to reinstall windows, if you are willing to do a small bit of work.

I know I've see guides on OCN, and else where that describe how to do this in detail.

Ah, I see. I have like nothing on here right now, ill just do a complete re-install with AHCI enabled.
post #6 of 11
There is a registry tweak that you need. All it does is enable the AHCI driver. Do the tweak, reboot and enable ACHI and you're done.

http://www.sevenforums.com/hardware-devices/17876-enable-ahci-windows-7-a.html
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post #7 of 11
You can enable ahci by editing a registry key and then change the bios setting.

goto:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci
on the right panel, edit the start key to 0
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post #8 of 11
Thread Starter 
Quote:
Originally Posted by NFSxperts;14657738 
You can enable ahci by editing a registry key and then change the bios setting.

goto:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci
on the right panel, edit the start key to 0

It is already on 0... Should it have been a 1? Does this mean if I change to ACHI it won't cause any boot issues?
post #9 of 11
Thread Starter 
Okay I changed to AHCI and it says Bootmgr is missing.

Hmm...

Sent from my Samsung Galaxy S2 using Tapatalk
post #10 of 11
Provided that you have already installed the ahci drivers and
if its already set to 0, then you SHOULD be fine changing to ahci in the bios
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