看来都不看官方说明，卡顿属于已知问题，卸载回退系统自带显卡驱动可以暂时解决：https://aka.ms/wip18936
[ADDED 7/12] We’re investigating reports that some Insiders are experiencing an unusually large amount of lag on their system after upgrading to this build. If you are impacted, you may have an improved experience by switching to the Microsoft Basic Display driver. To do this, right-click your display adapter in Device Manager and select Disable Device. Please note, doing this will result in the loss of advanced display features such as support for multiple monitors. Rolling back to the previous build should also address this issue and will allow you to continue using the advanced display features.
