Open a Dos command window and type in "ipconfig/all" without the quotes. It will tell you your IP.
If you don't know how then click on Start > Run and type "command" again without quotes in the small window that opens then click ok. You should see a black DoS window open. Now just type "ipconfig/all' hit enter and presto, you have your address.
If you don't know how then click on Start > Run and type "command" again without quotes in the small window that opens then click ok. You should see a black DoS window open. Now just type "ipconfig/all' hit enter and presto, you have your address.