I ran into a strange problem recently, I couldn’t ping from or to a Windows XP box on my network. After some unsuccessful experimentation, I thought that the problem may be caused by the NVidia chipset, so in the NVIDIA control panel, I disabled TCP/IP Acceleration, this fixed the problem immediately.
It appears that there is some kind of bug that severely affects ICMP packets in the NVIDIA TCP/IP Hardware Acceleration, so I would recommend disabling it. This isn’t the first I’ve heard of the NVidia network configuration settings causing all sorts of strange issues.
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