No Network adapters found Lenovo G570

I have inserted the disc of v sphere 5.0 it took me to installation.

It abruptly says that no physical network adaptore found.

Lenovo G570

core I3 4 GB RAM

64 bit compatable board.

FYI...

Please find the attachment.

please update me ASAP.

prasanthrobot@gmail.com

+918801131444