Windows 7: Network Connectivity Issue

Okay, here is another issue with wireless internet connection with Windows 7.

First, I do have a wireless connection when logging on, but after surfing the internet for a few minutes, it has an exclamation point indicating limited access to the Network. The wireless connection works when booting into Vista, the PC that has XP, and the laptop which has Vista Ultimate as well, but not on Windows 7.

I have a Linksys WRT54GS2 router, and have the following specs:

Windows Vista & Windows 7 Ultimate (not RC) 64-Bit (Dual boot)

HP Pavilion a6720y
AMD Phenom(tm) 9550 Quad-Core 2.20Ghz processor
6.0 GB of RAM

Wireless adapter: USB Wireless 802.11 g/b adapter

I've also tried the following stated from other posts to resolve the issue:

-Disabling IPv6
-Disabling HomeGroup svcs
-Removing and readding the connection
-Loading in Safe Mode (still the issue occurs)
-Uninstalling the driver
-Ran the network troubleshoot utility

Plus it takes forever when shutting down, and is stating that the coprocessor driver is missing (exclamation point)

I feel ignorant cause I'm going to school for Networking, but can't seem to figure it out with this one. I didn't want to conclude that there may be an incompatibility issue with Windows 7, but I was thinking of just uninstalling it. What's the use of keeping it if I can't access the internet? Good thing I made another partition just to try it out.

Could it be that my router isn't compatible? The adapter? Someone help!