: Search your inbox for "Corel" or "PaintShop" to find the original purchase receipt.
: If the software is still installed on another computer, you can often find the number by going to Help > About and clicking on System Info Activation Process corel paint shop pro x3 serial number and activation code
If you own a perpetual license, you may continue to use the software indefinitely, but Corel has no obligation to provide support or ensure activation servers remain active. : Search your inbox for "Corel" or "PaintShop"