I bought the $40 Windows 8 upgrade when they first began offering it a while ago. I haven't activated it yet so I'm assuming I can still use it (no expiration or anything like that right?). I was wondering if I could upgrade directly to Windows 8.1 though (I'm a little confused by some of the information here). From what I understand I want Windows 8.1 Update. Will I need to pay more if I'm...
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