In my database i have 4 tables named table1,table2,table3,table4.
I have a requirement

What i want is,

1.
An SQL user named 'testuser' should be able to access only table4.
This has been done without any problem.

2.
No other SQL User should be able to access table4 but should be able to access
all the other three tables.
SO I created a new role, Granted all the permissions(select,insert,update,view definition etc.) to it and denied all the permissions(select, insert,update,view definition etc.) on the specific object table4. so I added all the other SQL users in this role. It works perfect.

But Now what i want is that, not even any windows admin should be able to access table4. so i removed builtin\administrators from sysadmin Fixed Server role, created a user corresponding to Builtin\administrators in the database, Added that user to the new role that i created. But still when i log in using the credentials of my windows administrators account, i am able to see table4.

what do i need to do???

thanks