Hi, After many google searches, I'm stumped on this. So, recently, for no reason that I can see, Sketchbook Pro 2010 suddenly has terrible terrible brush lag, and ONLY Sketchbook Pro 2010. Artrage and Painter 11 both work fine. Paint Tool Sai as well. But SKP is my preferred sketching app, and this has been sort of crippling. It's always worked before, and I don't know why it's doing this..... I tried uninstalling it and reinstalling it, but that didn't seem to do anything. I turned off "press to right click" and that didn't do anything either. I turned off Stroke It, just in case. What's strange is that it's always worked great, so I don't see why it would suddenly stop. I did recently install Painter 12 and Paint Tool Sai, but I don't see why that would affect SKP. Does it seem worth it to do a system restore to the previous week or two, just to see if it works itself back out? Does anyone else have any tips?