Redmond says that it’s now working on a fix on this
One of the main problems experienced by users after making the move to Windows 8.1 is a mouse lag issue reducing the gaming performance on the new operating system, with multiple popular titles said to be affected.While Microsoft has remained completely tight-lipped on this until now, the company finally decided to provide more details on the problem and to confirm that a fix is on its way.
“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,” it said.
Redmond also goes on to say that mouse jitters, which usually means that the mouse cursor is jumping forward and back as you move it through a game, is happening because “Windows 8.1 handles games’ checks for the mouse status differently.”
On the other hand, if mouse acceleration settings and the measure mouse Polling Rate has a lower reporting frequency than expected, you’re recommended to check the game settings, as Windows 8.1 might have nothing to do with it. “If the game supports raw input from the mouse, enabling it may solve the issue,” Microsoft explains.
The company also provides a few workarounds for some of these scenarios, advising users to open the “Properties” settings of each process and check the “Disable display scaling on high DPI settings” option in the “Compatibility tab.”
In case you can’t left-click with an integrated pointing device immediately after pressing a key, Microsoft says that you should try toggling the “To help prevent the cursor from accidentally moving while you type, change the delay before clicks work” option in the Mouse & Touchpad PC settings screen to “No Delay.”
Additionally, switching process compatibility to Windows 8 might also come in handy, at least until Microsoft comes up with a fix.