Windows XP is no longer supported by Microsoft and usage for most web traffic has fallen into the 1-2% range (and is falling daily).
Being an older, unsupported OS (Operating System) means that Windows XP can not display sites that use modern SSL technology.
If this is a concern for you or you know you have many collectors who still use Windows XP, we recommend you wait to enable SSL on your site.
Fewer users use Windows XP every single day, so waiting to revisit the SSL issue for a short while is perfectly OK.
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