On Windows, start a command prompt and use ipconfig.
ipconfig /all
In the ipconfig output, look for the Physical Address. In the example below, the hostid = 0024E77DB960
Windows IP Configuration
Host Name . . . . . : LIGHTMAP-PC
Primary Dns Suffix . . . :
Node Type . . . . . : Mixed
IP Routing Enabled . . . : No
WINS Proxy Enabled . . . : No
DNS Suffix Search List . . : lan
Wireless LAN adapter WiFi:
Connection-specific DNS Suffix . : lan
Description . . . . : Intel(R) Centrino(R) Ultimate-N
Physical Address . . . : 00-24-E7-7D-B9-60
DHCP Enabled . . . . : Yes
....