Hi JDUNBAR,
Welcome to Sony Community!
What is the exact model name of your Sony Vaio computer? The settings depend on the model. We're not quite sure what key exactly you pressed, but you may try pressing the NumLock key, Fn + [CHAR]
We suggest checking out this article from Microsoft for further details: https://support.microsoft.com/en-ph/kb/290938.
Regards,
Vincent
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