Which of the following is NOT a valid version of Windows?

Correct option is C

Windows 9 is not a valid version of Windows. Microsoft skipped "Windows 9" and directly released Windows 10 after Windows 8. The official versions of Windows include Windows XP, Windows Vista, and others, but no version named "Windows 9" exists.

Important Key Points:

1. Windows XP: Released in 2001, known for its user-friendly interface and long-lasting popularity.
2. Windows Vista: Released in 2006, introduced new visuals but received mixed reviews due to performance issues.
3. Windows 10: Released in 2015, focused on a unified platform across devices with regular updates.

Knowledge Booster:

• Why no Windows 9?: Microsoft reportedly skipped the name due to compatibility concerns with older software versions that identified Windows 95/98 as "Windows 9."
• Windows Timeline: Some key versions include Windows 95, 98, 2000, XP, Vista, 7, 8, and 10.
• Microsoft focuses on Windows 10 and beyond, with Windows 11 being the latest major release.