Why my keyboard type wrong letter ?

Hi Expert
I just noticed when i typed letter on my keyboard, the screen show different letter. What is happening ? Any one can give some suggestion ? Thank you.
EESkyAsked:
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andreasSystem AdminCommented:
Maybe the keyboard layout changed? can you give examples? are all keys wrong or just some like y and z?

Which operating system re you using, Win, MAC or Linux?
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Tapan PattanaikSenior EngineerCommented:
Hi EESky,

Please check your keyboard language settings.
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nobusCommented:
what letter(s) do you type, and which ones you get ?
on what pc model ?  and OS ??
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Danny ChildIT ManagerCommented:
in w7 - Start.. Control Panel.. Region and Language.. Keyboards and Languages tab.. Change Keyboards button - and I would suggest you **remove** any non-required Language options.  

If you only have 1 installed, it will always be the default, and there would be no way to accidentally switch to another - via a hot-key, for instance.  

If your Z's and Y's are mixed, it probably means you've got a continental europe layout (France, Switzerland, etc)

US and UK layouts are quite similar, but " and @ change places, and the £ and $ signs do odd things too.

Once you have the correct settings, you may want to go to the Administrative tab - same location - and set the defaults to apply BEFORE someone has logged in.
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EESkyAuthor Commented:
Thank you so much for your reply. I just restarted it, then it work well. but i want to know what could cause the problem ?
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nobusCommented:
ghosts in the machine??  lol
impossible to answer that, without having more data
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