Hello,
I own an MSI GE60 2PE, with Windows 8.1 x64 installed (with an actual legitimate license, I bought a CD). It has an i7-4720HQ, 8GB (2x4) of DDR3 RAM at 1600Mhz, Nvidia gtx 860m graphics card and Intel HD graphics 4600 integrated graphics. It only has an SSD. Motherboard MSI MS-16GF (version REV:0.B). Bios AMI version E16GFIMS.526. All the drivers are up to date as far as I could check.
Now the problem: when not plugged in, the fan of my laptop is almost silent, on idle. As soon as it's plugged in, the laptop becomes loud, the fan gets increasingly faster, up to almost its maximum speed, or close. It's always been like that (I own the laptop for a bit more than a year now, and use it only on holidays). I didn't care at the beginning, and didn't even notice, but now it actually bothers me. I checked the components temperatures with Speccy, and when the laptopt isn't plugged, the CPU is at 48° in idle. The rest doesn't matter, since it doesn't change either way. When the laptop is plugged in, the CPU quickly gets to 60+ degrees, up to 70 (still on idle)
Now to identify the problem more easily and reduce the amount of reasons why this happens, I'll add that I changed the settings in control panel, power options. I set it to the same whether the laptop is plugged in or not. Nothing changed. Now I don't know what else it can be, so I ask for your help.
I added two screenshots of the cpu tab of the task manager, and we can clearly see that in idle, the cpu is between 8 and 10% usage when pc isn't plugged in. As soon as it's plugged in, cpu gets to 20%+ usage. It actually runs less threads when it IS plugged in than when it isn't (20 more, tried twice). Ask for anything if you need other info, I can't think of anything else to add.
Just some random things that I don't know if they'll help but just in case:
1. I do not have an antivirus of any kind. I disabled windows' firewall and windows Defender.
2. There isn no program shown to start up with windows in the task manager, except for an audio driver, and nvidia configuration panel (see 5.)
3. There is no peripheral device plugged in on the laptop, except a mouse.
4. Windows is up to date: windows update doesn't show any update available, except for a few secondary ones.
5. There is no program running in the background, except a mouse driver thingy, and Nvidia configuration panel.
In this panel, I set the graphics card to be used all the time over the cpu integrated graphics, whether or not the laptop is plugged in.
Thanks for any attempt to help
And sorry English isn't my native language, tried my best not to make any grammar mistake.