*runs into room* someone doing hardware modifications?
Wow, using ATA100 cabling, great idea! Usually people use glue or clip the pin, both of which are a more permanent solution.
Background for everyone involved: Pin-modding is the sad remenant of overclocking that is left to laptop users due to OEM's locking their machines up tight. In the Dothan days, 533FSB boards were backwards compatible with 400FSB CPUs by means of the BSEL switch. To pin-mod, all one had to do was be throw the switch low via a wiremod and the chipset recognized and ran the CPU at 533FSB.
Fast forward to now, it appears Intel has done the same thing (what else do you do with crappy chips?
), only, it appears out of spite, the backwards compatibility goes with throwing the needed switch high, which is a little more difficult, as discussed. Even though there are two BSEL switches, only BSEL 1 should have to be moddified. Also note that by pin-modding, you are modifying the speed at which the FSB runs at, that is it. Simply equate it to overclocking the FSB as you would on a desktop. Multipliers, cache, and all other inherent properties of the CPU are not modified.
This said, I dont think your operating system should make a difference, however, drivers might. The first thing I'd guess is/was Intel Speed Step turned off (either manually or by some weird automatic functioning)? Also, try running a pre-OS program, such as memtest 86+, and see what it reads your CPU speed as ( www.memtest.org
, grab the bootable iso, burn a CD, and boot to the CD; Your CPU frequency is in the upper lefthand corner). So far, your BIOS seems to recognize your CPU's frequency max as 2.16GHz, and it runs at full speed in the BIOS (as speed step CPUs do). If your CPU runs at 2.16GHz in memtest and speed step is enabled, then it would seem there is a driver, etc. blocking the CPU from functioning properly in windows. Therefore, the last thing I would suggest is try re-installing your intel chipset driver and seeing if that helps (I'm going out on a stretch, but hell, why not try it?).
Good luck with it and let me know how you make out. I'm glad to see someone had the cahones/time to try this awesome theory out