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I have installed SQL Server 2008 R2 on a new PC. Everything was working fine until I started exporting registered servers from the SQL Server 2008 R2 management studio which exist on my old PC. When I imported one of the registered servers to my new installation I got and error " Key not valid for use in specified state ". Now everytime I try to open registered servers on the new installation I get a .NET framework Unhandled Exception with the same message. The registered server area is completely empty. There is no way of adding any registered servers now. I have tried reinstalling SQL but the error remains. It is obviously related to the import process. Maybe something got corrupted. Does anyone know how to fix it? Edit:Details from exception dialog See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box. ************** Exception Text ************** System.Security.Cryptography.CryptographicException: Key not valid for use in specified state. at System.Security.Cryptography.ProtectedData.Unprotect(Byte[] encryptedData, Byte[] optionalEntropy, DataProtectionScope scope) at Microsoft.SqlServer.Management.RegisteredServers.RegisteredServer.ProtectData(String input, Boolean encrypt) at Microsoft.SqlServer.Management.RegisteredServers.RegisteredServer.get_SecureConnectionString() at Microsoft.SqlServer.Management.RegisteredServers.RegisteredServer.get_ConnectionString() at Microsoft.SqlServer.Management.RegisteredServers.RegisteredServer.get_ServerName() at Microsoft.SqlServer.Management.RegisteredServers.RegisteredServerTree.AddRegisteredServerNode(RegisteredServer regSrv, TreeNodeCollection nodes) at Microsoft.SqlServer.Management.RegisteredServers.RegisteredServerTree.AddServerGroupToNodeCollection(ServerGroup group, TreeNodeCollection nodes, Boolean createRecursively) at Microsoft.SqlServer.Management.RegisteredServers.Registere

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