
CandyFace
Hi rinrin
Take a look at this link, this person uses the exact same tablet as you, and it looks like there might be some extra steps for you to take to fix the lag. This is for windows 8, but I assume that the process is similar on windows 7 and 10,
http://blog.necktiedog.com/2013/12/10/fix-for-initial-stroke-delays-with-windows-8-and-wacom-tablets/