I am using Microsoft office on my computer for a while, but I didn't require it until some weeks before. I received a copy and product key, and Microsoft office work good for me. A few days before I ran into some computer issues, and had to do a system restore. Now when I try to open office, it is asking me for different product key. I don't have anything anymore that had the key on it, and now I need to use office for my work but I can’t. What should I do now?
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