Microsoft has issued an upgrade advisory for 240 million Windows 10 users who will lose security support, stating they will no longer receive updates. The company recommends upgrading to a secure Windows 11 PC, preferably with the Copilot+ feature. Users must consider the financial implications of this upgrade, as they face the choice of investing in new hardware or continuing with unsupported software. Microsoft encourages users to explore new PCs at major retailers and has provided shopping links. The deadline for Windows 10 support is October 14, 2025. Additionally, new Copilot+ PCs include features like Recall, which raises privacy concerns.