Lagging bad

OK I’m new to UE and have never used it before. I wanted to start simple and learn materials. I’m on a Alienware computer with 16GB of RAM and and I7 processor.
I will click change to parameter and go to name it and my mouse will just stop. I try to move it and it jumps all over the place. I haven’t even done a simple material so far because of this.
Is something set wrong.