Here are our recommendations for this issue:
1. Remove the LAN driver from programs and features.
2. Update your motherboard BIOS. The latest working BIOS version can be downloaded from the following web site:
Please be sure to read and follow all accompanying instructions, which can be found at this link:
3. Install the latest version of the LAN driver from the following website:
4. If possible, test with a different modem or router to narrow the issue properly.