The present invention relates to a method, processing system and a computer readable medium for determining a recommended alteration to a client processing system. In one aspect, the processing system comprises: a server processing system; a community application data store, in communication with the server processing system, having stored therein application data indicative of one or more applications used by a plurality of processing systems; a computer readable medium in communication with the server processing system, wherein the computer readable medium, when used by the server processing system, causes the server processing system to: determine, based on the community application data store, a recommended alteration to a client processing system, the client processing system being one of the plurality of processing systems; and transfer the recommended alteration to the client processing system.