When trying to deploy a SharePoint solution in Visual Studio 2010 folowing errors can occur:

Error 1 Error occurred in deployment step 'Retract Solution': The local SharePoint server is not available. Check that the server is running and connected to the SharePoint farm.

Solution: make the account you are running Visual Studio a member of the db_owner role on the sharepoint_config and sharepoint_admin databases.


Error 1 Error occurred in deployment step 'Activate Features': Cannot start service SPUserCodeV4 on computer '...'.

Solution: go into Central Administration, select System Settings, select Manage services on server. Find the 'Microsoft SharePoint Foundation Sandbox Code Service' and click Start.

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