Is buying OEM Windows legal?

Related questions

1. Can I still upgrade to Windows 10 for free in 2019?
2. How you can still upgrade to Windows 10?
3. Can OEM Windows 10 be reinstalled?
4. How much does Windows 10 professional cost?
5. What is license key number?
6. Can my PC run Windows 10?
7. What is the difference between OEM and retail Windows 10?
8. How do you check if your Windows 10 is OEM?
9. Can I use an OEM key to activate Windows 10?
10. Will Windows 10 work on my computer?

Tags

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3. #windows
4. #computer
5. #purchase
6. #version
7. #installed
8. #retail
9. #different
10. #difference
11. #allow
12. #license
13. #moving