Losing Connectivity When Computer Sleeps?

I recently installed Windows 7 (32-bit). I love everything about it except one major thing that seems to be a common problem, from the research I've done.Whenever the computer sleeps or goes in to standby mode, about 80% of the time when I come out of it, it loses the network connection. I will get one of two messages: "Local area connection doesn't have a valid IP address" or "Local area conncetion doesn't have a valid IP configuration." (It's usually the first message).I've Googled this several times and I've tried the fixes. I've tried searching for Bonjour (according to my Services list, it's disabled). I've tried setting the IPv6 off in the TCP/IP settings. I've tried changing the Wireless Adapter Setting's Power Save Mode to Maximum Performance. None of this has prevented this issue from happening.