User of member areas complaining of having to constantly log in again

A user who has signed up for Member Areas tells me that they cannot see the content of any of the pages, and they are continually challenged to log in again. Anyone have this experience? I don't entirely understand what they're seeing, but apparently, having accounts has made the site unusable for them.

Two things are coming to mind immediately. The user may have blocked cookies for your site or they are using a Private browsing window which forgets the login after they close the window.

Creedon, thank you for weighing in. The user now informs me that in subsequent usage, the problem has gone away. So, it may well have been as you suggested.