Long Range Solution

I recently had to relocate my computer to a room on the far end of my house away from our router (an older Linksys 2.4 GHz model - BEFW11S4 v2). I'm using a D-Link plug in wireless receiver (also several years old) to pull in the signal from the router. After the move, I now get a minimal signal, if any. Web pages are super slow to load and the system is basically unusable. I know the distance from the router is the basic problem but I'm wondering if there are any solutions. Are there new routers or receivers out there that might help? I had once used a signal booster for this problem without much success. Any suggestions are greatly appreciated. Thanks!