Pharos Reservation System with Windows 7

Hi there,
I work at a public library that uses the Pharos Reservation System for patrons using computers. Recently, we bought several new public computers using Windows 7 and installed Pharos on them. However, when patrons make computer reservations, the assigned computer already has their library card numbers on the screen. (Before, a patron was required to type in the number at the assigned computer). This is causing an issue, as some patrons are logging into computers assigned to someone else, and writing down other patrons' library card numbers. Do any of you who use Pharos at your libraries had this issue? Is it a problem on the Windows end or on the Pharos end? (It only happens with Windows 7 machines)
Thank-you very much.

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