|You don't need a disk to configure your router. In fact, even if your router's manufacturer did send one, I wouldn't touch it. It's likely loaded with proprietary software you don't want on your computer. The only thing you need to configure a router is a brain, a web browser and a wired connection plugged into one of the LAN ports on said router.|
While I'm not convinced the issue is with your router, here are some troubleshooting steps to go through on your router. (I wrote this as a "wireless" guide but it applies to any SOHO Router)
Click on my name above in this response and read my “how-to” guide titled, “Troubleshooting Wireless Issues” and go through the steps listed there.
If nothing works and you get to step 4, do try a different router. If you can borrow one from a friend, I would do that before buying one. If a different router doesn't fix the issue then obviously it's not a router issue but something wrong with each PC.
As an aside, if you're an avid online gamer, you'll want to have your gaming computer connected to the network with a network cable. Wireless totally sucks for gaming and tends to increase latency.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.