Ubuntu logo on abstract background

1200 × 750

Ubuntu login screen background

1920 × 1200

Ubuntu desktop background

1600 × 1200

Ubuntu desktop background

1600 × 1200

Ubuntu login screen

1920 × 1200

Windows Seven Logo — Blue

1440 × 900

Windows 7 default wallpaper

1600 × 1200

Windows Logo on Abstract Background — Black

1024 × 768

Windows logo on red background

1600 × 1200

white logo on teal background

1200 × 768

Windows logo on blue background

1920 × 1200

Windows logo on blue background

1920 × 1200

Windows logo on blue background

1920 × 1200

Ubuntu 10.4 Logo

2560 × 1600

Ubuntu desktop background

1679 × 1049

Ubuntu logo on dark background

1280 × 1024

Ubuntu desktop background

1024 × 768

Ubuntu desktop background

1366 × 768

Ubuntu Logo on Yellow Background — Warm

1024 × 768

Ubuntu logo on wood

1680 × 1050