Computer with security function and method therefor

A method for prohibiting access to a computer, having a radio frequency identification (RFID) chip and capable of having a removable radio frequency (RF) antenna security device installed therein, after a radio frequency antenna security device has been removed from said computer, comprising the steps of:

• (a) storing data comprising at least an antenna history, antenna error, detect coil, detect enable, tamper and access protection bit regions indicating that said security device was originally attached to said computer in a first region of first storage means at said RF chip in said computer, wherein said first storage means is capable of storing data received from said RF antenna while a main power source of said computer is turned off;
• (b) starting a procedure for prohibiting the access to change said stored data at said computer following the completion of said step (a);
• (c) using said data stored in said first region to verify that said security device was once attached to said computer by accessing at least said antenna history bit;
• (d) dynamically determining that said security device is no longer attached to said computer;
• and
• (e) prohibiting the access to said computer in response to said steps (c) and (d).