Hi MatiasRivero,
Welcome to Sony Community!
We apologize for the inconvenience. Was there any change that happened prior to this issue?
Try the steps below to fix the issue:
1. Make sure that there is no dirt or liquid spill on the keyboard.
2. Uninstall/Reinstall keyboard driver, check for driver updates.
3. Power cycle unit & reset BIOS defaults.
4. Perform Windows System Restore
5. If the issue still persists then service is required.
We kindly recommend visiting our Sony Global Web site for information on contacting the Sony Support Center in your region at http://www.sony.net/SonyInfo/Support/.
Regards,
Jen
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