I got a new computer, and loaded lightroom 5 that I bought from Amazon. It works fine though every time I open lightroom it asks for my license key numbers...it did not do this with the old computer. Please make a suggestion as it is frustrating to have to dig out the number every time I want to run Lightroom. Thanks.
Try this thread;
If that doesn't help you, try putting " enter serial number every time lightroom starts" in the search box at the top right of this page.