How to remove duplicate rows in SQL Server 2008 when no key is present

Find out the number of duplicates in the table:

select count(*), VISTX_ST_FIPS,VISTX_CTY_FIPS,VISTX_TC 
from TR00.NV_STARTER_INDEX
group by 
VISTX_ST_FIPS,VISTX_CTY_FIPS,VISTX_TC 
having count(*)>1
 
--- Delele them using following statement
DELETE
FROM  TR00.NV_STARTER_INDEX
WHERE TR00.NV_STARTER_INDEX.%%physloc%%
      NOT IN (SELECT MIN(b.%%physloc%%)
              FROM   TR00.NV_STARTER_INDEX b
              GROUP BY VISTX_ST_FIPS, VISTX_CTY_FIPS, VISTX_TC)