Win10 is free and safe. Why don't most users upgrade?

According to foreign reports, Microsoft CEO Satya Nadella said on Tuesday that Microsoft is protecting Windows users from digital security through fearless actions, and that Microsoft has made the most Important contribution: Free Windows 10 upgrades are available.
In the annual Microsoft Government Cloud Forum in Washington on Tuesday, Nadella told participants that "2015 is a year of cybersecurity issues. Eight of the largest data breaches The incident has caused the data record of 160 million users to be implicated," Nadella said, which caused a global economy of $3 trillion.
Nadella said that Microsoft is building an internal Cyber ​​Defense Operations Center to analyze potential cyber threats and coordinate the company's response strategy. In addition, Microsoft created the Enterprise Cybersecurity Group to provide threat assessment and monitoring to customers.
Nadella believes that regardless of whether Microsoft's initiatives can work, for most users, the most critical factor in ensuring network security is to install the company's latest version of the Windows operating system, and this does not require users Funding and time.
For some time in the past, Microsoft has been ensuring their network security by allowing users to upgrade to the latest version of the Windows operating system. In a 2014 analysis of Windows user data, Microsoft found that older versions of Windows Vista operating system users were four times more likely to be infected with malicious viruses than Windows 8.1 users.
Since the beginning of this year, Microsoft has upgraded the operating system to Windows 10 through a free upgrade. Under Nadella's leadership, Microsoft is transforming Windows from a product into a service. According to Microsoft's new solution, Windows 10's bug fixes are automatically done in the background. In addition, by launching the Device Guard feature that blocks untrusted software from being installed on your computer, Windows 10 also makes PCs less vulnerable.
Dan Guido, chief executive of the safety consultancy Trail of Bits, said, "It seems that Microsoft finally understands that users will no longer have to pay for security upgrades in the future."