Keynoard Crazy in Mac OS X 10.9.4

Hello.
I just installed the OS X 10.9.4 thirty minutes ago and when the computer restated, a notification appeared, and it said that the calendar plugin was not installed (something like that, I don't remember the exact text).
The computer was stuck so I decided to force a restart. After that, all seemed ok until I tried to use skype/word or any application that required the keyboard. When I press a key, t is like I pressed another one; for example when I press the a the computer types a/ , when I press m the computer types m;. The problem is that when I press the X it erases everything I've written. I've tried to restart it again and it does not seem to correct the bug. Does anyone have experienced the same bug? Does anyone know how to fix this?
I don't have the time machine set up.
Thank you.
Miguel

Hi Miguel,
Welcome to Apple Support Communities.
Take a look at the article linked below, it has a lot of great tips which may resolve the keyboard issue that you described.
One or more keys on the keyboard do not respond
http://support.apple.com/kb/TS1381
I hope this helps.
-Jason

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