| Build Number |
Date |
Description |
Released as |
| 669 | Unknown | First build of codename "Memphis" | |
| 1351 | 15 December 1996 | Referred to as Windows 97 | |
| 1387 | 7 February 1997 | First beta | Windows Memphis Beta |
| 1400 | 25 February 1997 | | |
| 1423 | 8 April 1997 | Developer's release | |
| 1488 | 26 April 1997 | | |
| 1511 | 30 May 1997 | | |
| 1525 | 26 June 1997 | | |
| 1532 | 26 June 1997 | | |
| 1546 | 31 July 1997 | Second beta. Expired 31 January 1998 | |
| 1602 | 3 October 1997 | the first build to be able to upgrade from Windows 3.1x. Expired on 31 March 1998 | Windows 98 Beta |
| 1629 | 12 December 1997 | Expired on 24 August 1998 | |
| 1691 | 16 February 1998 | Expired on 31 December 1998 | Windows 98 Release Candidate |
| 1723.4 | 10 April 1998 | Expired on 1 April 2001 | |
| 1900.6 | 28 April 1998 | Expired on 1 April 2001 | |
| 1998 | 25 June 1998 | Final version | Windows 98 |
| 2183 | 7 April 1999 | Expired 30 January 2000 | |
| 2222a | 5 May 1999 | Sold more copies than Windows 98, and offered improved reliability and compatibility with newer devices. | Windows 98 Second Edition |
