Get a Wifi wireless extender and put it halfway between the router and your computer.
This will cost free to $10. Get an old wireless router and use it as a slave or range extender. Print these instructions or any others you prefer if you need specifics for your new box manual setup.
https://www.tomsguide.com/us/how-to-turn-old-router-into-wifi-extender,review-5166.html
Before you start, log into your router (http://[your-router-IP-address]. You do know your admin password, right? From the WAN settings, copy down the gateway, subnet, DNS1 and DNS2. You can ignore the LAN side unless you have manually assigned addresses. Usually in the wireless menu, it will tell you what the IP range is for manual and wireless connections. Copy down the SSID, channel in use if not auto, mode (like C or N. You may need some of this info.
1. Disconnect everything from your comp. Plug your comp into the LAN side of the new box. Dump old settings on the new box. With newer Windows you may have to reboot to ‘find’ the router.
2. Configure the new box manually per the instructions.
3. Restore original cables as before starting. Maybe a Windows reboot again?
4. At the nether end, plug the LAN cable into the WAN side of the new box.
5. Test with your laptop and/or phone.