Deleting Duplicates From Around 25 Tables

I need to remove duplicate data from around 25 tables. I want to use a while loop to go through all tables. If I list out all of the column names the query runs fine, but since there are 25 tables some with 50 plus columns I was hoping to use something like the following, which errors out because my sub queries return more than one result.

SELECT q.* from
(Select ROW_NUMBER() OVER ( Partition BY (SELECT [name] AS [Name] FROM syscolumns
WHERE id = (SELECT id FROM sysobjects
WHERE type = 'U'
AND [Name] = 'Orders')
)
Order by (select top 1 [name] AS [Name] FROM syscolumns

[Code] ....