|Build of Windows 1.0|
Windows 1.03 is a minor update to Windows 1.02, released in mid-1986. It succeeds both 1.01 and 1.02 as a universal release in the US and other markets. It features additional device drivers, an improved SDK and updated Control Panel, Reversi, Write, and Paint to 1.03, the rest is 1.02. There are twelve different versions of 1.03 with timestamps ranging from summer 1986 to late 1987. This version also has a check/debug version dated to December 1986.