Is it zero or the letter 'O' in the key number? Vicky Po December 06, 2018 09:45 Updated Follow It's zero! We don't use 'O' letter in the key number. By the way, why don't you copy&paste the key? Related articles Registration limit exceeded Key is invalid error. What to do? Is there an automatic renewal after year of service? Where to download 25 applications? 'Key is already in use within another app' Comments 0 comments Article is closed for comments.
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