My keyboard disconnects and reconnects 5 seconds later, what are some possible causes and solutions?

This is a brand new keyboard hooked up to a brand new computer. The computer is Windows 7, 8GB of RAM, 3.8 Ghz AMD Quad-Core PC FX-4300 Processor, Nvidia Geforce GT630 GPU

Rather frequently, even in the middle of -insert expletive here- games where I die because I can't even hit pause; it simply disconnects, five or so seconds pass, and then it reconnects. Though it happens frequently, this is not to suggest that it is predictable. It can do it twice in half an hour or I could go hours without it happening. It could happen whilst playing a game or while I'm watching YouTube and not even touching the blasted thing. As you may have guessed, this is very, VERY annoying.

I have the keyboard hooked up to the computer via a USB extender (also new, high quality) and everything is USB 2.0, so lack of power shouldn't be an issue. The keyboard is also sitting on a small table in front of my couch so I HIGHLY doubt that I'm wiggling the cables about and causing it to disconnect that way. I also tend not to run too many applications at once, three to four at the max (whether that matters or not.) Though the keyboard is new, it is not high quality. It's just some cheapo keyboard and mouse combo that came with the computer. Finally, I feel it's important to note that ONLY the keyboard is misbehaving. The mouse has never done it, the wifi adapter has never done it, the bluetooth adapter has never done it, but the keyboard does it daily. I have no idea what it means, but I'm hoping one of you lovely people can tell me! That should be all the information that's even slightly relevant. If I managed to forget something, tell me and I WILL add more details within 10-15 minutes (assuming I'm awake.)