I'm trying to re-install a clean OEM version of Windows 7 onto my Lenovo X220 laptop. My existing installation with all of the Lenovo bloatware was giving me some trouble (in particular, the computer kept waking up out of standby and draining the battery, the fingerprint reader was intermittent, etc.) so I wanted to just wipe it and start fresh.
This is normally a pretty smooth process... but I'm having some aggravating issues getting it working this time around.
When I boot from my good Win7 Home Premium OEM SP1 64-bit installation disc, I get the message "A required CD/DVD device driver is missing".
Basically, it's asking for the AHCI drivers. Okay no problem, I downloaded them and put it on a USB stick
... And it detected it, as "Intel Mobile Express Chipset SATA AHCI Controller" which gave me some hope.
... but after about 30 seconds of thinking, it comes back with the error "No new devices could be found. Make sure the driver files are correct and located on the driver installation media".
I tried downloading the Intel Rapid Storage Technology Driver Windows 7 (64-bit), Vista (64-bit), XP (64-bit) - ThinkPad
drivers from here and putting that on the USB key:
And then I also tried a multitude of "Intel Rapid Storage Technology" drivers from Intel's website. They all appeared to have the same INF files inside.
I tried using a USB 3.0 stick, and also a native USB 2.0 stick
I tried multiple different Windows 7 installation discs that have worked in the past - Win 7 HP OEM 64-bit, Win7 Pro OEM 64-bit, even a Win 7 Pro 64-bit Volume License ISO
I reset the bios to factory defaults. I also tried putting it in "Compatibility" mode
I tried with a regular hitachi SATA hard disk, and also with a Kingston HyperX Solid State Drive
I'm out of ideas... what do I do now?