For months I have been experiencing problems with my Lenovo laptop, G505s, which simply keeps shutting down all the time. I have had it cleaned (twice in a month), but even though it doesn't get hot anymore, it still keeps shutting down. This usually happens as soon as I open two or three tabs on my browser at the same time, so I guess the problem is not overheating. There is no "blue-screen-of-death" or any other warnings.
Can someone please explain to me why this is happening, and give me some advice on this matter? Hopefully something that I could do myself (I know this is too optimistic, but I really do not feel comfortable with strangers "fixing" it without any improvements anymore)?
This is my first post here, so I apologize in advance if I did something wrong.
Thank you so much in advance!