For Windows 2000, XP, and NT

1. Go to start
2. Select run (should be in the start up menu items)
3. Type CMD
4. In the command box (the black box that will appear) type: ipconfig/all
5. The computer Mac address will be found on the line that shows physical address.

For Windows 98

1. Go to start
2. Select run (should be in the start up menu items)
3. Type winipcfg
4. The computer Mac address will appear in a box on the screen