Delete duplicates in Excel 2007

How is you vba knowledge?
You could write a macro to do this.
Two things, if the columns are not related you could sort one column first and then the other column, that way the duplicates are inmediately visible.
You could also record a macro that does the following:

Start macro recorder
Go to Data extended Filter
Select the first column to sort
choose to copy only unique values to another location on the sheet
when finsihed repeat for the seond column and choose a new location next to the previous one.
Then all you have to do is clear the first two columns and move both new columns to the same location.
Sounds difficult? Try it on a test sheet and see what happens.
You can then check the vba editor and see how the macro works to help you along.

If you want I'll try and attach a sample file for you.

 

try this to find the duplicates http://support.microsoft.com/kb/213367