gqsmooth :
Try the OS in IDE mode NOT AHCI.
That should install the OS.
Do not do this. If you install the OS in IDE, it's just a pain in the ass to switch back. Try this first, then if it doesn't work you can try doing the REGEDIT tip.
I had the same problem. Here is what I did and it worked.
If you are using Windows 7 and you go to do a your fresh installation and the drive does not show up as available in the setup screen but it was showing up in the BIOS follow these steps now:
After booting into the installation disk, at the welcome screen press shift+f10 and a cmd window should pop up. Enter "diskpart" (w/o quotes), then "list disk". Your SSD should be listed here, note which disk number it is listed as. Enter "select disk x" (where x is the number of your disk). Then enter "clean". Cochise! Finish your install. Also be sure to check out the "Useful SSD Articles Part 2" topic in these forums for some suggested tweaks to your disk to optimize for Win 7.
First of really really appreciate all the suggestions here...you sure learn something!
I did however waste 3-4 hours on this, and I've been in this exact situation before at the pc repair shop i used to work at. The solution at that time was a newer DVD of windows7. Cant remember any more details though.
My situation now:
A friend dropped off a pc and im supposed to install w7 ultimate on a brand new Kingston SSDnow 120gb. It has a ASUS p5k premium motherboard and it does support ACHI. However i cannot for all thats holy get this s*** to register in the w7 install. If i set IDE in bios it finds the drive np, but not ACHI. I'm installing from a USB created with the microsoft usb tool, which have worked wonders in the past. Windows detects the other disk. Tried disconnection all but the ssd, still no luck
I tried all the suggestions on this page... nothing worked, doesnt show AT ALL in win7 install not even diskpart.
I gave up yesterday and now im installing in IDE mode and im gonna shift back using the registry edit afterwards.
This got long, but my question is now very simple:
Why was this reg thing such a bad idea to begin with? Is there something unwritten? if it really is as simple as 2 reg keys i kinda should just have done that to begin with doh ! ... fair enough gqsmooth, you did say try your suggestion and the try the reggy thing. Trouble is i'm very persistent and stubborn, and ended up trying all kinds of other solutions
😛
EDIT:
So big news!! im installing on that PC in IDE while writing this on another pc. It finished really fast. I then hesitated to regedit and tried chaning bios to ACHI without making the reg changes, and guess what, it booted up just fine and found a lot of new hardware ^^
I dont know if the fact that i used the newest iso with service pack 1 on has anything to do with this.
Now there is only really one thing showing up in device manager, and that is the expected intel chipset thing, so i guess everything is fine as soon as i install that,.... which is nice