Wireless cutting out (on computer end)

[Amethyst Star]

This hasn't been a HUGE problem, but now about once a day or once every two days my computer will stop detecting any wireless networks. I haven't seen a pattern in why it would do that and I know it's my computer because my roommates haven't had a problem. One second my connection's great and the second it's telling me, "You're not connected to any wireless networks." I'm going to try and run another virus scan tonight, though I don't know if that's the problem. This computer is a few years old, but by no means ancient. I'd just rather not have the wireless card poop out if that's what's going. Any advice?

[Ynot]

what's your signal strength like? does it still happen when the machine is right next to the wireless router?

[Amethyst Star]

Yep, it's right next to the router. I'm sure it's my computer because normally I can see six to eight other secured connections (and one unsecured), and when it cuts out, it doesn't detect any connections at all. I have to restart my computer and then it's fine.