By john 
A keyboard that produces the wrong letters or symbols turns simple typing into a guessing game. This problem is usually caused by a language or layout setting rather than a hardware wso slot88 fault. A few quick checks normally get your keyboard typing correctly again.
Possible Causes
The wrong keyboard layout or language being selected is by far the most common cause, since different layouts place symbols in different places. Num Lock being switched on can also turn part of the keyboard into a number pad.
A driver glitch, or a stuck or damaged key, can occasionally cause wrong characters too, though settings are the usual culprit.
First Troubleshooting Steps
Check the keyboard language and layout in Settings and make sure it matches your physical keyboard, such as the correct regional layout. Then check Num Lock, in case letters are being replaced by numbers.
Restart the computer, which can clear a temporary glitch affecting the keyboard.
Advanced Steps
Remove any extra keyboard layouts in Settings so that only the correct one remains, which prevents accidental switching. If the problem continues, update or reinstall the keyboard driver in Device Manager.
Testing with an on-screen keyboard or a USB keyboard will tell you whether the built-in keyboard hardware is at fault.
It is also worth checking whether the wrong characters appear only in certain programs, since some apps have their own input or shortcut settings that can interfere with typing. If the keyboard behaves normally elsewhere, the problem is within that single app, and resetting its keyboard or input options usually resolves it.
Safety and Data Warning
Make a note of your current keyboard layout before changing it, so you can restore it if a change does not help. Use only official drivers from your manufacturer, and avoid third-party driver tools from unfamiliar websites.
If you connect a USB keyboard to test, use one you trust rather than an unfamiliar device, and disconnect it once you are done. Keeping a spare keyboard available makes it easy to keep working and to diagnose this kind of problem quickly if it ever happens again.
When to See a Technician
If a USB keyboard types correctly but the built-in one keeps producing wrong characters, the laptop keyboard hardware may be faulty. A technician can test and replace the keyboard, which is a common and affordable repair.
Conclusion
Most wrong-character problems come from the keyboard layout or Num Lock. Checking those settings first, and removing extra layouts, gets you typing correctly again in the majority of cases.