Reoccurring connection issue while gaming

Go to your Device Manager, find your wireless card, and make sure you dont have it set so it can enter a power saving mode.

Gut reaction is that you've got a weak wireless signal. Maybe getting a better card, or better antenna for your current card might help. It's also possible that you could replace the antenna on your router to get a strong signal out. Wireless can be a tough thing to diagnose issues with remotely, as there are so many things that can cause interference between a client and the router.

Another common issue can be having multiple networks set as preferred networks that you will automatically connect to. This can cause a momentary loss of connection when it sees that one is stronger than the other. Obviously, if you only have one wireless network in range, or saved, then this isn't the issue.

There is always the potential for your wireless card to be failing. This is unlikely, as is it unlikely that the port it's plugged into is failing, but swapping cards/ports (if alternates are available of course) might be a good troubleshooting route. Also, the obvious question comes up, could you go wired instead? If you game, wireless is never a good option if you want to play online. Many people do it and have no issues, but you'll always have a better connection through a 100/1000 mbit ethernet port than over wireless.

If you have any other option, you really shouldn't use wi-fi for gaming.

That may not be especially helpful for the particular problem you describe, but it sounds like the other folks have that covered, so here's a chuckle and some unsolicited advice instead.