Excel 2010 Removing duplicates

I am trying to remove the duplicates items from a big Excel sheet.
I would like to remove all rows that have a duplicate code values (sample below)

Before:

Name     Code
item_01  xxxx01
item_02  xxxx02
item_03  xxxx01
item_01  xxxx03
item_04  xxxx04

After:

Name     Code
item_01  xxxx01
item_02  xxxx02
item_01  xxxx03
item_04  xxxx04

I have played with the "Remove Duplicates" features, but I can't get the result that I want.

Any help?
Thanks

Answer

You've not explained "the result that I want", but I will take a shot at this.

When you select both columns then click Remove Duplicates from the Data ribbon, the below dialog window opens. Remove the check box from the column you DO NOT want the duplicates removed and then click OK.

It results in the example you gave above.