Article ID: 973560 - View products that this article applies to.
When you try to use a secure Web Services on Devices (WSD) device with a computer that is running Windows 7, you may encounter one or more of the following problems:
This problem occurs because the Function Discovery Provider Host (fdPHost) service cannot access certificates that are installed or updated after the fdPHost service was started.
This problem affects device certificates and root certificates that have a trust chain to the device. If either of these certificates is installed or updated after the fdPHost service was started, the device seems to be unavailable or offline. However, this problem occurs with all Web Services on Devices (DPWS) devices that implement security.
For more information about certificates that a secure WSD device requires, see the "More information" section.
To work around this problem, restart the fdPHost service.
Note After you restart the fdPHost service, you may also have to restart any affected third-party services that use fdPHost for discovering or for using WSD devices.To restart the fdPHost service, use one of the following methods.
CertificatesA Windows-based client and a secure WSD device that communicate over a security channel use certificates when they establish a connection.
A secure WSD device must meet the following certificate requirement:
For more information about secure WSD device certificates and Windows-based client configuration, visit the following Microsoft Web sites: