Wired Keyboard 600 with slow response and Some of keys do not work when I press them.

Description:

When you try to quickly press a sequence of keys on a Microsoft wireless keyboard that is connected to a Microsoft Windows-based computer, you may experience a one to two second delay before the keystrokes appear.
This issue occurs if the Use FilterKeys check box is selected in the Accessibility Options item in Control Panel.
When you click to select the Use FilterKeys check box, your keyboard ignores brief or repeated keystrokes.
You can also adjust the keyboard repeat rate. The keyboard repeat rate is the rate at which a key repeats when you hold it down.

Solution:

To resolve this issue, click to clear the Use FilterKeys check box.

1. Click Start, click Control Panel, and then select Ease of Access Center.
2. Select Change how your Keyboard works or Make the keyboard easier to use.
3. Click to clear Turn on Filter Keys, or adjust the settings to a quicker rate.
4. Close the Window.

If the issue is still not fixed, it can be a very critical problem with your computer affecting your personal data and the Windows Operating System. You will have to chat with our Experts or you can check with your local technician to get the problems fixed with very high priority.