Windows Vista: high CPU load when LAN cable plugged in

A friend recently visited me with his notebook that is running Windows Vista. As soon as we plugged in the network cable, everything became very slow for him, task manager showed a cpu load of ~30% even though not a single application (unless you count task manager itself) was running.

We tracked the problem down more or less: the problem goes away if you remove unused protocols and VPN support from the network adapter (Control Panel > Network & Internet > Manage Network Connections).

I did some research on Google and it seems it can also happen for wireless interfaces. Why this hasn’t been fixed yet is a mystery I guess…


About dfspspirit

PhD student in bioinformatics, interested in photography, level design, digital image manipulation, architecture and, of course, bioinformatics.
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