If you see the text ' Pick a category ' see Fig 1 as the main title on the page and under the Control Panel title you can see ' Switch to Classic View ' you need to click the ' Switch to Classic View ' you are currently in 'Category View' by clicking on the link or by pressing tab until the ' Switch to Classic View ' is selected and then press ' Enter '. Double click on ' Accessibility ' Options or press the ' A ' key repeatedly until Accessibility Options is highlighted and then press ' Enter ' to display the Accessibility Options see Fig 2.
You should now be able to use the number pad on your keyboard to control the mouse cursor. See Fig 3 for a description of which keys do what. Double click on ' Accessibility ' Options or press the ' A ' key repeatedly until Accessibility Options is highlighted and then press ' Enter ' to display the Accessibility Options see Fig 1. The new implementation made important improvements in how acceleration works, and in most cases works well enough.
Some including myself consider it essential to enable mouse pointer acceleration [link to Coding Horror blog]. There is a large possibility that the effects of the error were found during testing and an attempt was made to fix it. RIGHT NOW, for millions of people, movement of the mouse pointer on their screens is being controlled by an algorithm which includes that conceptual error and "fix error". The conceptual error and the "fix error" have finally been fixed in Windows 7.
The broken behaviour can be very very subtle, which may explain why it has not been more widely recognized as a problem and why it has taken so long for it to be fixed. The behaviour is:. By reading what Microsoft have written about Windows XP mouse acceleration , and some investigation, we can explain how the acceleration should have worked. Microsoft intended that the velocity speed of the on-screen pointer measured in inches per second would depend upon the velocity of the on-mouse-pad mouse also measured in inches per second.
They defined an acceleration formula that translates the velocity of the on-mouse-pad mouse to the corresponding velocity of the on-screen pointer. To turn the calculated pointer velocity into a number of pixels of mouse movement involves some simple formulae. If the "Time" term corresponds to a regular periodic interval, such as the time period between mouse updates, or the time period between each screen refresh, then we can also use this:.
For example, a regular time period of 0. If something is moving 2 inches every 0. This is a key question, and where the conceptual error occured. The correct time interval is the interval that occurs between successive pointer position updates and identically the correct rate is the rate at which the pointer position is updated. In Windows, the mouse position is updated every time mouse movement counts are sent from the mouse to the PC.
The correct rate to use is the Mouse Bus Update Rate. A moving mouse connected via a USB bus typically sends movement counts times each second Hz. At this point, the team within Microsoft designing and implementing the mouse acceleration got confused. The section titled "Relating to Physical Units" indicates that an incorrect formula for Vpointer was used:. Using ScreenUpdateRate in the formula would have been appropriate IF the pointer position was updated every screen refresh. Of course, it could have been that the Microsoft team had only been imprecise with their formula.
HOWEVER, the example in that section also shows that they have used their incorrect formula: a correct examination of their example gives a physical to virtual gain of 5, NOT the 3 that they calculate. Of course, it could have been that the Microsoft team had only been imprecise with their formula, AND also clumsy with their example. Let's examine this formula. In order to move the mouse pointer a given physical distance on this high resolution monitor measured in inches , we would have to move the pointer a LARGER number of pixels, because each pixel is smaller.
Despite the confused formula and example on the Microsoft Pointer Ballistics webpage, one would hope that the correct Pixels MouseBusUpdate formula is used, as above. However, the formula used is:. Note: rather than multiplying by ScreenResolution, the formula divides by ScreenResolution. Also undesirable is that how far and how fast Windows XP and Windows Vista move the mouse pointer, depends upon the screen refresh rate. The Microsoft team put screen refresh rate in their formula because they wanted to REMOVE any possible effect that screen refresh rate might have had on mouse pointer movement, but instead they ADDED an undesirable effect.
The real reason why mouse acceleration is broken? Investigations into Windows mouse behaviour. Fix Builder can build. REG files for Windows 10 or 8. What is it again? An interesting programming exercise! How do you use it? Verify or edit the suggested settings, clicking OK as you go. See below for non-Administrator account use. Reboot or Log off to apply the fix you have to reboot or Log off.
For example, in Counter-Strike: Source and other Source games, do use -useforcedmparms and don't use -noforcemspd. In Half-Life, CounterStrike 1. Enjoy exactly 1-to-1 mouse to pointer response for your custom desktop settings! Why do you need a fix? This provides you with a quick way of ensuring that the changes you have made actually do what you want them to do. The Notification options within FilterKeys can be very useful.
By checking the ' Beep when keys pressed or accepted ' option, the user is notified upon each selection being entered into the computer.
Many users find this reassuring and allows them to concentrate on their input device rather than the screen, as and when they wish. When the ' Show FilterKeys ' status on screen option is checked, a small stopwatch will appear in the system tray near your clock as shown in Fig 4. When you click on ' Ignore repeated keystrokes ' and then click on ' Settings ' which is next to it, a separate dialogue box appears see Fig 5. From here you can tell the computer to ignore keystrokes repeated faster than a time of your choosing:.
When you click on ' Ignore quick keystrokes and slow down the repeat rate ' and then click on ' Settings ' which is next to it, a separate dialog box appears see Fig 6.
From here you can tell the computer next to ignore keystrokes repeated faster than a time of your choosing:. From this dialog box you can choose to either switch all keyboard repeating off completely, or customise it to match your own preferences.
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