Retrieving last record in each group from database - SQL Server 2005/2008

Question

I have done some seaching by can\'t seem to get the results I am looking for. Basically we have four different management systems in place throughout our company and I am in

Answer 1

;with cteRowNumber as (
    select COMPUTERNAME, SERIALNUMBER, USERNAME, LASTIP, LASTUPDATE, SOURCE,
           row_number() over(partition by COMPUTERNAME order by LASTUPDATE desc) as RowNum
        from YourTable
)
select COMPUTERNAME, SERIALNUMBER, USERNAME, LASTIP, LASTUPDATE, SOURCE
    from cteRowNumber
    where RowNum = 1