Hello Finnish,
Thank you for posting your query on Microsoft Community.
As per the issue description you are unable to type @ key on your keyboard. I can understand how frustrating that could be to see your keyboard not behaving appropriately. However, let’s work together to get this problem
resolved.
Let’s try these methods below and check if that solves the problem.
Method 1: Try Hardware and devices troubleshooter
The hardware and devices troubleshooter can detect and fix errors and incorrect settings in devices. You can run the built in troubleshooter in Windows 8 and check by following these steps:
a) Press Windows Key + X, select control panel
b) Change the ‘view by’ option on the top right to ‘Larger icons’
c) Select the Troubleshooting option and click ‘view all’ on the left panel
d) Run the ‘Hardware and devices ‘troubleshooter.
Method 2:
Let’s follow the steps in the article below and check if that helps in solving the problem.
Troubleshoot wired keyboards that don’t respond or that type wrong characters
http://support.microsoft.com/kb/258826/en-us
Note: This article deals with Windows 7 but steps provided holds good for Windows 10 too.
Method 3:
If problem persists let’s check the issue by using
OSK (On screen keyboard) and see if issue persists or not. If issue will not appear it means the issue is with keyboard.
Windows also has the On-Screen Keyboard (OSK), an Ease of Access tool. Use the OSK instead of a physical keyboard to move around your PC and enter text. You don’t need a touchscreen to use the OSK. The OSK displays a visual keyboard with
all the standard keys. Select keys using the mouse or another pointing device, or use a physical single key or group of keys to cycle through the keys on the screen.
Use the On-Screen Keyboard (OSK) to type
Method 4
If issue persists, the issue could also be related to the device (Keyboard) drivers and other updates. I want to inform you that updates will be released by Microsoft. So, I would suggest you to keep checking your Windows
updates not only important one but optional too. If any available try to install them and see if it helps you to fix the issue.
Try to install all of the Windows updates available and if issue persists, try to update the Device (Keyboard) drivers by following the steps provided in the article mentioned below.
How to: Install and Update drivers in Windows
10
If issue still persists, then install the drivers for Windows 8/8.1 from the manufacturer's website in compatibility mode and check if that works.
Make older programs compatible with this version of Windows
http://windows.microsoft.com/en-in/windows-8/older-programs-compatible-version-windows
Reference:
http://windows.microsoft.com/en-us/windows/network-connection-problem-help#network-problems=windows-81&v1h=win81tab5&v2h=win7tab1&v3h=winvistatab1&v4h=winxptab1
Hope this would help. If issue still persists post back with current status of your computer and result of the proposed suggestion, we will be happy to assist you.
Regards,
