What can I do when our router have great connection with mobile internet, but Wi-Fi connection from my PC to this router working very bad? Signal quality is 76% - 86%, but site browsing is very lagging etc. (Connection sometimes fail, but bigger problem is low browsing (of websites) quality)... My brothers with Windows not have this problem. Adapter - USB TP-Link, PC - AMD64. Now I'm using latest version of Linux kernel - and it's WiFi tools. Thank you!