Voluntarily, to Microsoft, likely means: "Within the conglomeration of legal jargon we know no one will ever read, but we prevent access to our software if you do not claim to have read it, it states in technical terms, appearing Greek to the non-Greek layman: we collect your IP when you activate our software."

The US constitution not applying to other countries aside; a locked journal is also equivalent of your own memory, but authorities would certainly break into said journal.