Why My MacBook Pro Late 2013 is lagging significantly whenever I plug
I have a MacBook Pro late 2013 15inch that I bought exactly a year ago. Lately it have been lagging A LOT whenever I plug it into the power adapter to charge it. Everything lags and becomes extremely slow when its plugged in (UI, gaming fps)
I've looked online for a solution for a while now and I can't seem to find anyone who's facing the exact same problem as I am, so I hope that someone out here can help me find a solution because this is my one and only PC that I own and its my only goto device for anything that I wanna do ):
I installed an app to monitor my MacBook temperature and its always at 40-55 Celsius while I'm casually using it (watching youtube, surfing the web) as a matter of fact its at 46C right now as I'm writing this and I only have Chrome and Skype open, I'm guessing that's a little bit high for just these two simple apps running?
Also on my activity monitor i've noticed that my kernel_task CPU usage is at 2% when it's unplugged, but whenever I plug it in it rises to 600%!! and then the lag starts..
I tried resetting SMC and PRAM with no results, I installed windows 7 through bootcamp hoping that the issue might be software related but nothing changed in windows either, so what is it?
Nothing have happened to my MacBook prior to this problem that might have caused it, I just woke up one day and my MacBook started acting slow whenever its plugged in for no reason, my trackpad stopped clicking in all the way down as well, don't know if that might be any useful information?
So what could the problem be and what should I do? and please don't suggest that I take it to an apple store or genius bar because those don't exist in my country :/
thanks in advance.
MacBook Pro with Retina display, OS X Yosemite (10.10.1), MacBook Pro Late 2013 15inch
Is this a good question?