Hi, i registered an account here because i had no other choice; all my attempts at fixing this were in vain. I have a macbook pro 5.1 running OS X 10.6.8, and i wanted to undervolt it using coolbook. After tinkering with the settings, nothing appeared to change, the voltages and frequencies throtteled normally under load. I then installed voodoopower which also didn't work, and after that IntelEnhancedSpeedStep. With the latter one, i managed to switch the frequency to the lowest setting and the voltage as well, but the problem is that i can't switch the frequency to a higher setting. I then uninstalled IntelEnhanced and coolbook but the frequency is stuck at the lowest. The question is, how do i revert back to factory default?