title: Unable to install SQL Server 2008 R2 with Default Instance
body: <p>I have installed sql server 2008 R2 with default Instance as "MSSQLSERVER" and due to some reasons uninstalled the same through control panel,if i try to install again with Default instance("MSSQLSERVER") it is giving error "Instance name already in use".</p>
  
  <p>Excuse me if it is a duplicate question. Tried for almost 2 hours found this link
  <a href="https://dba.stackexchange.com/questions/40306/how-do-i-remove-a-sql-server-2008-instance-from-command-prompt-w-o-removing-the">https://dba.stackexchange.com/questions/40306/how-do-i-remove-a-sql-server-2008-instance-from-command-prompt-w-o-removing-the</a>
  but no luck.</p>
  
  <p>Appreciate if anyone can help me regarding this issue with out using named instance.Thanks</p>