...speed and loud. Two nights ago had a serious weather squall line come through, high winds and rain. As far as I could tell, no lightening close by. My HP desktop was on when powered flickered on and off a couple/few times. Computer power button lit when I checked it afterwards but mouse didn't bring screen up. So pushed power button, held till off then pushed to power back on. As title notes, fan(s) full speed, loud and constant but computer working. So, did some googling for issue. Finally found one that said, disconnect power from CPU and then push power button 10-30 secs. That seemed to work, at first and for awhile. Then later fan engaged again at high speed. Followed same procedure again, eventually same result. There was another entry along the same line except it said to disconnect everything from CPU. Then push and hold button, then reconnect. Mouse and keyboard had to get recognized on reboot. So far that has seemed to do the trick, 'fingers crossed'. Without opening CPU I did some cleaning of vents and fan areas too. No idea what difference disconnecting everything makes/made, if any. While I can hear fan and know it's working perhaps because more aware, thinking it's normal now. Thought I would share what happened, perhaps others had a similar experience. Not that tech savvy, so going into bios etc likely not an option for me. Right now just hoping for at least status quo. Any thoughts?