Error message on Booten

[billinares]

After upgrading to Labview Ver. 7.1 i installed most of the drivers
that came along. Realizing that this was not necessary i procedeeded
to remove all of them but two. Now every time i start my computer i
receive the message: unstable virtual device detected and the prompt
to terminate. The booting process stops while user answers. How to
correct problem?