1. Blue Screen of Death (BSOD): This error screen appears when Windows encounters a critical system error, often requiring a reboot.​

2. 'Bliss' Wallpaper: The default Windows XP background, depicting green hills under a blue sky, became an iconic image.​

3. Clippy the Office Assistant: Introduced in Microsoft Office, this animated paperclip offered assistance, becoming both helpful and a subject of user frustration.​

4. Solitaire and Minesweeper: These pre-installed games provided entertainment and introduced users to graphical interfaces and mouse usage.​

5. Start Menu: Debuting in Windows 95, the Start Menu revolutionized user navigation, becoming a central feature in subsequent Windows versions.