After a few CPU overheating issues (note: I love my M1330, would recommend to anyone.) this evening I happen to notice my laptop has a particularly loud whine. Not sure if it was ever that bad, I had heard it before but thought nothing of it. A quick Google found this gem:
Start> Control Panel> Device manager>
– Click on the Bluetooth radio’s node (the plus sign)
– right click on “Dell Truemobile 355 Bluetooth + EDR”
– Go to properties
– Click the Power Management tab
– UNCHECK: Allow the computer to turn off this device to save power.
The second I clicked OK, the whining stopped. Fantastic stuff! Perhaps this is because I have Bluetooth on constantly or something, and Windows and the BIOS are trying to fight to turn it on or off. I have no idea, but it worked.