With Windows XP a new system has been invoked where software developers can add certificates to the software making sure from where a certain software comes.

To get such a certificate for EpiData costs some funding. Maybe it is worthwhile paying and maybe not. Another "running cost" without other aspect than having an external certification office, e.g. verisign telling that software from http://www.epidata.dk is certified to come from epidata.dk is maybe not needed.

What users can do to certify that there is no problem in installing EpiData software and be sure that there is no problem with this is:

1. Always get copies of software directly from Http://www.epidata.dk 2. Add "Http://www.epidata.dk" to "trusted websites" in 2a - firewall 2b - instllation policy of the individual user PC 2c - installation and software policy of the institution.

Until someone finds a "software publisher certificate" essential and wishes to fund the issuing of a certificate I think funding is better spent on development.

So in short: When the installation message says "Unknown publisher" - if you downloaded the software from Http://www.epidata.dk/download.php you can say yes to the install. If your system prevents this, then follow the advice points 2a-2c and try again.

Kind regards

Jens Lauritsen EpiData Association

ps. Very few bugs have been documented in analysis. In the solving of those present undocumented updated versions for testing will be available as www.epidata.dk/downloads/setupepidatastattest.exe When a coming build is available for test this will be mentioned at the test page as usual- avialable through the link on the left side of the main menu.