On October 14, 2025, Microsoft officially ended support for the Windows 10 operating system, meaning devices running Windows 10 will no longer receive security updates or technical support. This transition is significant for enterprise and consumer customers, as it raises cybersecurity concerns and may accelerate device upgrades or replacements. The company is urging users to migrate to Windows 11, but not all hardware is eligible, prompting additional concerns about electronic waste and device lifecycle management. Despite this major company event, MSFT stock closed at $514.05 on October 13, 2025, up 0.60%, indicating a positive but moderate market reaction ahead of the support deadline, with no evidence of outsized volatility or negative sentiment directly tied to the announcement.