Hi Kiquenet,
Thank you for contacting Intel.
Please try this troubleshooting guide - Intel® Desktop Adapters — Intel Ethernet Desktop Adapter Troubleshooting Guide
In case this doesn't resolve the issue, please check with HP* to see if they have Windows* 2008 driver. Intel recommends that you obtain and use the software provided via your system manufacturer.
Hope this is helpful.
Sincerely,
Sandy