For Windows 7 there weren't any drivers listed, for Vista there's this page:
http://h10025.www1.hp.com/ewfrf/wc/...n&cc=us&dlc=en&sw_lang=&product=3462614#N4053
there's this:
"Summer 2007 Original Intel Chipset Driver" (not really an updated driver)
http://h10025.www1.hp.com/ewfrf/wc/...n&cc=us&dlc=en&sw_lang=&product=3462614#N4053
and possibly this:
"Intel Matrix Storage Manager Driver Update" (don't know what this is to be honest)
http://h10025.www1.hp.com/ewfrf/wc/...dlc=en&lc=en&os=2093&product=3462614&sw_lang=
Before posting I did try to do some searching, one thing mentioned was some people thought it would be a good idea to install "Intel RST" drivers". I didn't really understand what they were (and don't know what RAID is exactly) so decided not to dive into unknown waters. Is this something I can / should try to install?
http://www.tomshardware.com/answers/id-700708/intel-rapid-storage-technology-software.html
http://www.intel.com/support/chipsets/imsm/sb/CS-020644.htm
http://www.intel.com/support/chipsets/imsm/sb/CS-020784.htm
"Intel Rapid Storage Technology provides benefits to users of single drives as well. Through AHCI, storage performance is improved with Native Command Queuing (NCQ). AHCI also delivers longer battery life with Link Power Management (LPM), which can reduce the power consumption of the chipset and Serial ATA (SATA) hard drive."
I'm pretty sure I know what's wrong. If you only performed the MS reg hack that you linked to in your OP, without performing the rest of the steps, it won't work. MS needs to proofread their guides a bit better. This is the exact procedure for switching storage modes in Vista and 7.
1. Open regedit as admin.
2. Locate and then click one of the following registry subkeys:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\IastorV
(Either or both subkeys may be present on systems running Intel SATA/AHCI drivers. IastorV is Intel but change whichever subkey is present.)
3. Click on msahci, then in the right pane double-click the value Start.
4. Change the value data to 0, then click OK.
5. Close regedit, restart the computer and immediately enter BIOS/UEFI setup utility.
6. Locate the SATA storage controller section and change the storage mode from IDE to AHCI.
7. Save the changes and exit BIOS/UEFI to reboot.
Note: If you fail to immediately enter BIOS/UEFI setup and change storage modes, after editing the registry, when Windows boots to the desktop the registry will revert to IDE and you'll have to repeat this procedure from the beginning. Also, be sure that you are updating all 32-bit Vista storage drivers and all 64-bit Windows 7 storage drivers, for performance sake.
Edit: The latest IRST (Intel Rapid Storage Technology) drivers are what you want to run on both systems. Just be sure to iinstall the latest Intel chipset driver on each system first.
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