Question Internet speed issue

Sep 21, 2020
23
1
15
Helloo everyone,

I have strange problem. My internet speed today halved. I have 50/30 but ti is allways 70-100 / 45-50 range. Today my max on speedtest.net is 15 for download and 45 for up. I try everything but with no success. I plug another usb wifi dongle and results - same. Plug same usb dongle in another laptop on same position ( so you dont blame router /range /distance /signal ) and result - I get what I pay. Next try cable - slow start but rest OK. Kaspersky to scan everything and still nothing. I see client in router ( mikrotik ) registered as 150Mbps client, and W10 also show in connection info 150Mbps. Also I try to manualy change settings of WLAN card but no success. Ping is OK in any case, around 20 ms. Can someone help?

Laptop is Dell Inspiron with latest driver Broadcom 1704 b/g/n adapter. Anyone?