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Kaspersky is unlikely to be the culprit; it doesn't prevent Heroes from accessing the network (unlike programs like Hamachi). And there's no need to uninstall it – simply disabling it should suffice.
I suspect there's another issue with their server. People are also experiencing problems with Heroes 6, which requires the Ubisoft server to run.
I suspect there's another issue with their server. People are also experiencing problems with Heroes 6, which requires the Ubisoft server to run.