AS_Administrators and AS_Observers Security Groups Must Not Exist Prior to Setup

The AS_Administrators local security group is created by the AppFabric setup program to have read-write access to the persistence and monitoring databases. The AS_Observers local security group is created by AppFabric setup to have read-only access to the persistence and monitoring database. If either or both of these security groups already exist when the AppFabric setup is executed, the setup program will not run, and an error message will be posted in the Platform Validation page.

To unblock setup, open the Groups page of the Computer Management console in Windows, delete the AS_Administrators and/or AS_Observers group(s), and then resume setup.