Importing registered serves fails in MSSM 2012

Question

I exported servers two days ago, and did a clean install of Win7, now when I try to import that sqlservers.regsrvr I face this error:
===================================
Key not valid for use in specified state.
 (System.Security)
Program Location:
   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.DoOnRegisteredServerCreated(RegisteredServer server)
   at Microsoft.SqlServer.Management.RegisteredServers.RegisteredServerTree.OnRegisteredServerCreated(RegisteredServer server)
   at Microsoft.SqlServer.Management.RegisteredServers.RegisteredServerControl.Events_SfcObjectCreated(Object sender, SfcObjectCreatedEventArgs e)
   at Microsoft.SqlServer.Management.Sdk.Sfc.SfcApplication.SfcObjectCreatedEventHandler.Invoke(Object sender, SfcObjectCreatedEventArgs e)
   at Microsoft.SqlServer.Management.Sdk.Sfc.SfcApplicationEvents.OnObjectCreated(SfcInstance obj, SfcObjectCreatedEventArgs e)
   at Microsoft.SqlServer.Management.RegisteredServers.ServerGroup.RaiseSfcAppObjectCreatedEvent(SfcInstance obj)
   at Microsoft.SqlServer.Management.RegisteredServers.ServerGroup.Import(String file)
The operation 'Import' failed. (Microsoft.SqlServer.Management.RegisteredServers)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=11.0.2100.60+((SQL11_RTM).120210-1846+)&LinkId=20476
Program Location:
   at Microsoft.SqlServer.Management.RegisteredServers.ServerGroup.Import(String file)
   at Microsoft.SqlServer.Management.RegisteredServers.Utils.Import(ServerGroup parentGroup, String filename)
   at Microsoft.SqlServer.Management.RegisteredServers.RegisteredServersContextMenuManager.ContextImport(Object sender, EventArgs e)
All exported were remote, and I checked save username and passwords in export window. 

Answer 1

Hi MaysamSh,
According to your description, you want to import and export registered servers between computers by using SSMS. The error may occur due to some encryption enabled in your existing registered server list, you can try to delete or rename the files
below and then give a try to import the registered servers again.
C:\Users\[USERNAME]\AppData\Local\Microsoft\Microsoft SQL Server\100\Tools\Shell\RegSrvr.xml
OR
C:\Users\[USERNAME]\AppData\Roaming\Microsoft\Microsoft SQL Server\100\Tools\Shell\RegSrvr.xml
For more information, you can refer to the following article.
http://chocosmith.wordpress.com/2011/02/02/ssms-r2-key-not-valid-for-use-in-specified-state/
Regards,
Sofiya Li
Sofiya Li
TechNet Community Support