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Microsoft ended support for Windows 7 in January 2020 and it no longer receives security updates. It nevertheless remains in service on machines that cannot run a recent version, on industrial workstations and alongside older software or peripherals whose drivers were never updated. Chkey.ch supplies Windows 7 keys for exactly those situations.
Home Premium is the consumer edition, Professional adds domain join and XP Mode, and Ultimate brings BitLocker and multilingual interface packs. A Windows 7 computer should be kept off the open internet, or placed behind a properly configured firewall.
Delivery by email within 24h, with an Swiss invoice.
