I have a (ThinkCentre M72e) Window 7 Pro, 64 bit i5 computer here who's processor fan speed is running constantly at 100% even at boot up . To ensure this is not a over heating issue, I checked CPU with SpeedFan and ALL temperature readings are in the mid 40's and below. I moved the RAM from SLOT1 to SLOT2 and no change. Restored BIOS to Defaults, even Clear CMOS and replaced battery, still the processor fan is constantly running at full speed. What are my other options I can try to get the fan speed back to normal?