wifi speed drops down

[yahya abou dalal]

My wifi normal speed is 50 mbps which I get using internet speed test.After working for some time using chrome and retesting speed it shows about 30mbps.If I restart my comouter or disconnect thr wifi and reconnect I restore the 50 mbps but for unspecified time after that it drops again to 30 mbps and stays on this speed.I checked background services including upgrade and stoped them with no success.Every thing works normally at the lower speed.thanksyahya

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