Fans on and off are driving me insane (MacBook Pro 13, Windows 7 x32)

I have had this problem for the past three weeks or so. When I am using Windows, the fan will spend half its time on, half off. It never used to be this way and I am not sure what could have pushed it over the edge - I have not installed any new programs or drivers. This also does not happen in Mac OS - and the system is equally warm under both operating systems. I keep reading on other forums that Apple has not done anything to remedy this situation - is that true?

At this point, if you try installing driver again, try using Driver Sweeper 2.0 from Guru3D to sweep and delete drivers in addition to uninstalling. That can clean things up and help, but I am at a loss and just from reading seems mixed results on MBP as to which ones to use and work or not.
So do browse through today's posts. Though I am perplexed MacRumors couldn't help - seems mixed and the Mac Pro section sometimes more help than Windows on Mac. Though the MacBook area you tried also?

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