For the life of me, I cant figure out what happened to my solidworks recently. When I make a new part file, click new sketch, and go to select a plane as normal. The planes show up, but as I hover over them, the program freezes until it catches up with highlighting the plane. I took a video of what happens that will explain it a lot better than I can through text. Also, not sure if this makes a difference, but my planes used to be the green/red and now they are just the solid blue line around them. I have not changed anything and this came at the same time as when it started being slow. When I hover over anything in the feature tree, it slows the program down until it can finish outlining/highlighting the item. Again, please watch the video and you'll see exactly what I'm talking about. Solidworks is up to date, graphics driver is up to date, no issues in diagnostic mode. Let me know what you think. Here's the link to the video.
SolidworksParts And Features