Reasons for Lenovo Yoga 2 11 running slow?

Laptop runs really slow. Never really liked this thing. Only use it for school and work. Restored it and reinstalled windows but still slow as s***. It still works but it's extremely laggy and can't get anything done. Any idea of what else it could be and how this had happened? I had webroot installed when I first purchased the computer.

Well… I mean really it only has 4 gig of ram… It has to share that ram with the hd graphics… It only has a " Pentium " processor…( and that's 100% slower than the old i3 laptop processor )…

So… It's-s-s-s-s-s more then likely your running to many programs at the same time… Or programs that require a lot of resources…