From a recent post:
Maybe this articles will help you:
"Removing builtin\administrators: Some pitfalls to avoid"
http://www.sqlservercentral.com/columnists/kKellenberger/removingthebuiltinadmin
istratorssomepitfallstoavoi.asp
"10 Steps to Securing your SQL Server"
http://www.sqlservercentral.com/columnists/bknight/10securingyoursqlserver.asp
HTH, Jens Suessmeyer.
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http://www.sqlserver2005.de
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>I read an articale some time ago that stated that the
> BUILTIN\Adminisrator account should be modified so that
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>
> Thanks