Enable AHCI in Windows 8 and Windows 10 after Installation  

Umut said:

Its a 3 year old pc and i never searched about IDE & AHCI until today. Because my pc was working fine with Windows 7 until installing Windows 10 last month. After that, ONLY when i open 8-9 browser tabs sometimes SSD usage increases to %100 and a few second later everything freezes around a minute or so.

Hi Umut

Your freezing issues are almost surely caused by the Anniversary Update of Windows 10.

Check out this thread on reddit:
Windows 10 fully freezes after anniversary update : Windows10

The fix that worked for me was the following:
DaEistee comments on Windows 10 fully freezes after anniversary update

First post here. First thanks to all for giving valuable tips.
When I had my Apple Mac mini's and installed Windows 8 and I wanted to change from IDE to AHCI I simply booted in Windows, changed in msconfig.exe to safe boot - minimal, rebooted and changed back again to normal boot. Recently I moved away from Mac mini's to an ASUS VC65R and need to change from AHCI to RAID and same trick worked there too.

On another note - some people have mentioned that they like to create/delete folders on the Start Menu. I have Classic Start menu installed (but am not running it...) and when I want to make folders or move stuff around I start the Classic menu and create / delete folders in there and it gets propagated to the Metro Start Menu.

I attempted this today, unsuccesfully I'm afraid. I have a Samsung 850EVO SSD.
As I went through the registry changes I found that at step5 value was 0, at step 7/8- HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\iaStorAV, there was no option for StartOverride. I went back to iaStorV and found the StartOverride option there which I changed fro 3 to 0. at step 11 value was 0, step 15 value was 0.
I then closed regedit and booted to BIOS, changed to AHCI, saved & exited to restart.
Instead of restarting, I got this error message "INACCESSIBLE_BOOT_DEVICE"
I went back to BIOS changed back to IDE, same message.
Finally Windows "repaired the problem" and the computer restarted normally.
I went back to regedit and found the iaStorV\startoverride was changed back to 3.
Any idea what went wrong and how I can make the change?

Brink said:

Hello John, and welcome to Ten Forums. :)

If the StartOverride key is not there at step 6, it'll need to be added.

Not being well versed in registry editing, how does it get added?

Thanks

Brink said:

Hello John, and welcome to Ten Forums. :)

If the StartOverride key is not there at step 6, it'll need to be added.

One more question. Does the StartOveride key in iaStoreV need to be changed to 0 also?

Brink said:

Hello John, and welcome to Ten Forums. :)

If the StartOverride key is not there at step 6, it'll need to be added.

Is there more than one way to skinthis cat? I also came across this post of the forum which seems simpler...good method?

One more question. Does the StartOveride key in iaStoreV need to be changed to 0 also?

here's the screenshot of the registry window