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It always happens to me. O&O Software gave me a license for O&O Defrag 11 Pro, but then the license is invalid.

What do I do?

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up vote 4 down vote accepted

Contact O&O support? I'd guess you're already registered.

http://www.oo-software.com/home/en/support/index.html

Of course, if they repeatedly give you an invalid license key then I'd probably ask for a refund and try and find a different product.

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