Buying a legitimate Windows 7 ISO image is difficult today because in 2014 and ended all extended support in January 2020 . Since it is "end-of-life," Microsoft no longer provides official download links or direct retail sales . Where to Find Windows 7 Legally
While you cannot buy it directly from Microsoft, you can still find legitimate copies through secondary markets: Windows 7 home premium iso download for 64 bit and 32 bit buy windows 7 iso image