Wi-Fi Problems

[mitsosha]

My problem is that my computer is about 7-8 meters away from my computer and there is a wall between them too. I changed the router and the new one has lower signal range but that isnt the problem. The problem is that since i upgraded my computer to windows 10 i was needed to change my adaptor

(tlr8187_wireless) since there weren't any drivers for this version of windows and i couldn't get any signal at all i bought a usb adaptor that supports windows 10 and the speed now is even lower. When i had the computer connected with cable i had speed about 4.3 Mbytes per second. With my old router connected to my pc where is is now i had about 85% of that. With new router at windows 7 i have about 0.5-0.6 Mbytes with picks of 1 Mbytes or 1.5 Mbytes in some cases. But with windows 10 and the new usb adaptor i have about 0.3 Mbytes per second. What should i do? Changing the router is out of the quetion right now. One last thing. My phone with Speedtest app gets around 3.2 Mbytes per second in the same room. i though of making my phone a Wi-Fi hotspot connected from the router and sending to my pc but i meat a lot of technical problems and i couldnt get throuth it. I am sorry about my bad english and i hope you could understand what i want to say and maybe help me out.