Updated (11/8)

We want to thank our gaming community for the detailed feedback many of you have provided on these issues. We have released some fixes and workarounds that will allow you to get back to your gaming.

The “mouse lag” issue is actually several different issues that could vary based on the game, input methods used, etc.

The three following issues are addressed by a fix we have provided in KB 2908279:

Mouse jitters (jumps forward and back) as you move it through a game
– This occurs in some games because Windows 8.1 introduced changes to mouse input processing for low latency interaction scenarios and this causes some games to respond differently to mouse input than in previous releases of Windows.

Mouse movement is not to scale even after acceleration is turned off
– If you have turned off acceleration to make the distance on the screen match the distance you move the mouse, that may not work correctly anymore.

Measured mouse Polling Rate has a lower reporting frequency than expected
– If you have a gaming mouse that has a high frequency, when you test it, you may find it is reporting a lower frequency than you expect. Note: if you previously encountered issues with measuring the polling rate you will need to follow the instructions in KB 2908279 to ensure that, not only the patch is installed, but also the app used to measure the polling rate has an appropriate registry entry to enable the fix for that specific executable.

peppy wrote:

Can someone make a .reg for this?

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers]
"C:\\Program Files (x86)\\osu!\\osu!.exe"="NoDTToDITMouseBatch"

Rundll32 apphelp.dll,ShimFlushCache

Espionage724 wrote:

peppy wrote:

Can someone make a .reg for this?

http://puu.sh/5g9P1.zip

- Run osu! 8.1 Mouse Fix.reg to import the registry entry
- Run ShimFlushCache.bat
- Reboot

osu! 8.1 Mouse Fix.reg contains:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers]
"C:\\Program Files (x86)\\osu!\\osu!.exe"="NoDTToDITMouseBatch"

ShimFlushCache.bat contains:

Rundll32 apphelp.dll,ShimFlushCache

Gabb1995 wrote:

I did all the steps and it's still not fixed for me.

Espionage724 wrote:

Are you on Windows 8.1 (with GA updates), and have you installed the hotfix from http://support.microsoft.com/kb/2908279?

Espionage724 wrote:

peppy wrote:

Can someone make a .reg for this?

http://puu.sh/5g9P1.zip

- Run osu! 8.1 Mouse Fix.reg to import the registry entry
- Run ShimFlushCache.bat
- Reboot

osu! 8.1 Mouse Fix.reg contains:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers]
"C:\\Program Files (x86)\\osu!\\osu!.exe"="NoDTToDITMouseBatch"

ShimFlushCache.bat contains:

Rundll32 apphelp.dll,ShimFlushCache

Gabb1995 wrote:

Espionage724 wrote:

Are you on Windows 8.1 (with GA updates), and have you installed the hotfix from http://support.microsoft.com/kb/2908279?

I am on Windows 8.1, do I need to install some Windows update manually? If yes then from where? Also no I havent done the hotfix I thought it was in the fix you sent let me try it with the hotfix first. Thanks for help.

EDIT: It worked after I installed the hotfix, thanks for help I can finally play Osu! at uni.

peppy wrote:

Has this update been released on windows update yet?

Espionage724 wrote:

peppy wrote:

Has this update been released on windows update yet?

Just did a clean install of 8.1, didn't get the update automatically.

I wonder if the update gets offered if you happen to have one of those games it mentions installed, but I doubt it.

Marcin wrote:

Have you tried this solution... p/2681094 ?

Lokorfi wrote:

What if I have problems with my mouse stability and sensitivity on a non-Windows 8 OS? Because I'm not really sure if it's just the mouse's laser len thing or the program itself, because it used to work perfectly fine with osu.

"C:\\Program Files (x86)\\osu!\\osu!.exe"="NoDTToDITMouseBatch"

"C:\\Program Files\\osu!\\osu!.exe"="NoDTToDITMouseBatch"

peppy wrote:

Has this update been released on windows update yet?

xhsl940616 wrote:

For me, it says update is not applicable to your computer. What do i do?

Cjmmz wrote:

It did not work after following the steps in the solution.
But then, i tried to put it in compatibility mode for Windows XP (Service Pack 3) and it worked perfect.
(I have Windows 8.1 32-Bits)

626kelvin wrote:

running on 8.1, i still have the same problem and tried the steps a couple of times.
-comp already got the update
-created the .reg no fixes

NaThaNeL wrote:

since the new Update my Tablet is buggy but why??