My Acer laptop is only 2-3 months old, and it shut down without warning. 88% battery so it wasn't out of power. As the light from the window was affecting my eyes I had moved and I was sitting with it on my lap but only for a short while and it wasn't hot. It's been really slow and laggy since purchasing it, jumpy while scrolling on webpages, it doesn't keep up with my typing a lot of the time - and I'm not a superfast typist. I'm also not very tech savvy so any replies could they please be in 'idiot language'. I can understand some tech speak just nothing that involves delving deeper than tech spec.It wasn't hibernation or sleep - I had to restart and got the Acer start screen. Note: while typing this it did it again. Luckily for me, when I opened up my browser it asked if I wanted to restore and it opened up exactly where I was when it shut down. So that's twice in about 5 - 10 minutes. Battery now 78%.