It's about eight months old or so, an HP Envy m7 Notebook PC. A while ago I noticed that it would randomly start lagging really bad, and literally begin running in slow motion. Any music that's playing would play in slow motion, moving the mouse around would cause it to skip and jump around, and if I'm watching a video it will skip too. When this happens the fan with run really loud.
It used to only do it every now and then and it wouldn't stop until I restarted my laptop ever since yesterday it does it all the time. Only when I'm running a video game or something, though--but that used to not happen. I used to be able to run whatever video game I wanted, plus iTunes, plus have a browser open, no big deal at all.
Yesterday I was running Minecraft, and it wasn't lagging or anything, when suddenly I got a blue screen that said it had encountered a problem and needed to restart. It restarted and I viewed the details of the restart, and it had experienced issues in three different locations. I remember one was in an AppData folder, another said something about memory, and the other was computer gibberish I don't understand. I figured that meant it was something with the physical memory (I think that's what it's called? The amount of memory that goes on your screen), but I'm not sure.
I'm running a full virus scan now, and it's at 87% and hasn't detected anything. Any help? I Googled and couldn't find anything similar.