1. Windows loses 400 million usage that grows using Mobile, Linux and Mac  Techspot
  2. 400 million Windows PC lost in 3 years. Where did they all go?  Zdnet
  3. Windows lost 400 million users in the last three years – official Microsoft phrases shows the instructions of the shrinkage base  TOMIN ISSUE
  4. Microsoft has lost millions of Windows for Windows 11 Debate, lost millions of users – does it really refuse ships?  Windows Center
  5. Microsoft, perhaps 400,000 in three years lost the Windows user, claims technological expert  Xda