Windows login screen with text

1024 × 768

Ubuntu Logo on Blue — Calm, Digital Art

1600 × 1200

Ubuntu Logo on Background — Gray, Neutral, Digital Art

1024 × 768

Ubuntu Logo with Chameleon

1366 × 768

Windows 7 startup screen

1680 × 1050

Windows 7 startup screen

1600 × 1200

Windows Seven Logo — Blue, Dramatic, Digital Art, Text, Black

1920 × 1200

Windows Seven Logo — Blue, Serene, Digital Art, Text, White

1024 × 768

Windows Seven Logo — Blue, Dramatic, Digital Art, Light Beams

1920 × 1080

Windows Seven Logo — Blue, Dramatic, Digital Art

2000 × 1250

Windows 7 Logo — Windows 7 Professional

1920 × 1200

Ubuntu Logo on Pink Background

1920 × 1200