Fan throttle - security timeout

I was curious about something I observed... I was installing a program that took some time, and left to do some errands (as to not stare at the progress bar slowly inching along). Somewhere in the middle of the install, a windows security alert popped up, which I wasn't there for... so when I returned (maybe 15-20 minutes later) I received the 'verification timeout' message, and noticed my fan was running on high as if the system was under heavy load... even though it was waiting for me to verify the windows security.

By contrast, when the system is idling, it is whisper quiet... sooooo what am I missing here? Is the processor staying throttled up while windows waits for me to verify administer privileges? Is this bad for the computer... a fault of windows or a quirk of the dell fan control?

Everything returned to normal and install resumed when I clicked 'retry'... so nothing is wrong that I can see... unless this can corrupt the install somehow, but I doubt it... I'm just interested why this would happen with a scientific curiosity, to be clear.

 

Heh, well I don't get it either. Letting a windows 'administrator' authentication window time-out shouldn't be bad in any way, should it?