When installing updates for CS5 products or components, the Adobe Application Manager reports, "Some updates failed to install. The following updates were unable to install. If you wish to install these updates, please fix the problems below and retry: [name of update] Another instance of Updater is running. Please try again later."
NOTE: If you don't see the workstation service, you don't have it installed, choose Start > Network Connections, and open the Properties for your active Local Area Connection and install the Client for Microsoft Networks. The updater should work properly now. If not, check the now visible Workstation service in Administrative Tools > Services and ensure it is started.
When you attempt to install multiple CS5 updates at the same time, the first update is the one reported in the error message. Since the Adobe Bridge updates typically appear first in the list of updates, this error most often occurs with the Adobe Bridge CS5 4.0.2 update. However, if that update is disabled in the list of updates, the next update in the list generates the error.