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FAQ 2589FilterKeys

Windows has a few default "accessibility" features that can ironically cause your keyboard to seem inaccessible, unless you know how the operating system is trying to interpret your keystrokes.
The problem...
FilterKeys is easily turned on by accident. If you have never used this feature before, it would seem as if your keyboard stops responding, other than to make strange beeping or clicking sounds.

This document explains how FilterKeys works, and how to get your keyboard back to normal.
What it does...
FilterKeys is an accessibility option that adjusts the keyboard response so that inadvertently repeated keystrokes are ignored. Using FilterKeys, you can also slow the rate at which a key repeats when you hold it down.
FilterKeys Activation
In Windows, it is activated by holding the right [Shift] key down for 8 seconds or more . When FilterKeys is activated in Windows, a chirping sound is heard and you will see this pop up.

Often, this happens to people because they are already distracted while they are typing, or preoccupied with some other decision about what to type.

It is easy to misinterpret this question, and cause FilterKeys to take control of your keyboard.
Settings
To control FilterKeys, you can go to "Start" then "Control Panel" and "Accessibility Options". Here, you can enable or disable all the accessibility options. For example, toggling the "Use FilterKeys" checkbox is one way to turn FilterKeys on or off.

Clicking the [Settings] button will allow you to disable the 8-second keyboard "shortcut" sequence that causes FilterKeys to become active.
Turning FilterKeys Off
Another method for turning FilterKeys off is the same 8-second depress of the right [Shift] key... The computer will make repeated chirping sounds until 8 seconds is reached, and then you can resume normal typing.
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