The Wifi on my Toshiba Satellite C50-B-13N is getting slower and slower - download speed of <1Mb and upload 0.2Mb or zero. My other Laptop in the same location is getting 35Mb up and 10Mb down so its not the Router. Could it be the Network Adapter (Qualcomm Atheros AR956x) or is there something else likely to be going on? Can I measure the Network Adapter's performance somehow?