Compaq is now owned by HP. Check the HP website for drivers.
or since you failed to identify your NIC, here additional info that might help:
To find make and model of pc hardware, EVEREST Home Edition is a free system diagnostics, system information program that will id most hardware onboard a mb.
Run the program and then:
Click on Computer
Click on Summary
Right hand window (hardware) if the text is blue
this is a link to the web site for that particular hardware.
An alternative program is Belarc Advisor from www.belarc.com
(a little more simple to use than Everest but not as good about identifying a place to find the driver).