Remove sql server service from windows 7 I had installed and later uninstalled SQL Server 2005 . I used registry cleaner tools and deleted all files related to SQL Server . Still the services console shows entry for previous installed database instance name .
Services management console I get this entry in Description column.
Failed to Read Description Error code 2
How to delete them otherwise new installtion is showing problem.
Well, the crude way is to run regedit as admin, go down to 

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services

and remove the service entry from registry and reboot...

Or perhaps use the sysinternals process explorer tool to do the same thing....