I downloaded A security Update CD And it stopped everything!!

Help!!! Please!!
I downloaded A security Update CD And it stopped
everything!!I am horrified.
Yesterday I received from Microsoft a Security Update
envelope. They offered it to me from their Homepage, one
month ago. I downloaded it this morning. Only the Norton
Antivirus (February 2004) It cheked for virus my computer,
found NONE and then a dialogue window apeared that says
C:/WINDOWS/System32/EBAPI2.DLL and then Accept and that`s
it, nothing more can be DONE. Nothing.
I start and start the machine, and the same thing happens.
I can`t even close it properly. It has to be done just
pressing the clese button in the CPU. Because the cursor
kekeeps showing the waait signal forever.
What do I do? I have urgent work to do and important
things I have not saved.
HELP!!!
I have another old computer with no internet connection
but that can work together with the one with the problem,
Question 2 is may I open it and get into the net
connection and move the documents I need to this old
computer to be saved? Or will it also sahre the problem?
Please I need help NOW!
From lima Peru
Pilar Avellanal