This happened to me and I went crazy. but is actually really simple once I found the solution.
For windows OS got to :
Control Panel :
then look for,
Ease of Access Center:
scroll down till you see,
Make the keyboard easy to use :
select,
Filter Keys:
and then select "OFF"
Slow Keys.
this is to protect you in case you're too drunk and fall asleep on top of your keyboard after watching porn.
hope this helps.
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Thread locked as a mercy killing because you bumped a 6+ year old thread about a problem in Linux, and your post relates to Windows.
Harvey
Senior AnandTech Moderator/Administrator