First off, we want to thank our gaming community for the detailed feedback many of you have provided on these issues. While we don’t have a date yet for the release of a fix, we are working to get these issues resolved as quickly as possible. The “mouse lag” issue is actually several different issues that could vary based on the game, input methods used, etc.
There are a few workarounds that have been found to help some of these issues, which we list below.
Mouse lag in video games since upgrading to Windows 8.1 - Microsoft Community
A Guy