WiFi Speed Down From 300Mbps To 54Mbps?

Mar 18, 2012

For my laptop, the speed was 300Mbps few days before but it changed to 54Mbps last night. I did not change any settings for my router and adapter and the only software I installed during this period is Windows update of March. I found the client monitor in router's setup page displays 802.11n is disabled. So what are the reasons?

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