Networking anomalies.

Router is a WRT160N, and my wireless adapter is a WMP600N. The computer with the adapter is having the issues.
Linksys Wireless Manager as well as Network Diagnostics claim that I'm connected to the network. But I'm not getting any signal(sometimes, but very inconsistently). There isn't any consistent error message either.
Also, whenever it does struggle to somehow connect, only the normal icon in the systray says I'm connected to the internet; wireless manager claims I'm offline 100% of the time. Linksys wireless manager says: "Your adapter has been configured and you are connected to the network. However, Linksys Wireless Manager could not verify your internet connection."

Things I've tried:

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Power Cycles

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Hard resets

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Find INTERNET PROTOCOL (TCP/IP) in the list
Click Properties
Click ADVANCED
Click the DNS tab
Click ADD
Type the IP Address 192.168.1.1

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Reset WINSOCK entries to installation defaults: netsh winsock reset catalog

Reset IPv4 TCP/IP stack to installation defaults. netsh int ipv4 reset reset.log

Reset IPv6 TCP/IP stack to installation defaults. netsh int ipv6 reset reset.log


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Also, here is my ipconfig /all:

Microsoft Windows [Version 6.0.6002]
Copyright © 2006 Microsoft Corporation. All rights reserved.

C:\Windows\system32>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : Zetsurin-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : Velazul

Wireless LAN adapter Wireless Network Connection 3:

Connection-specific DNS Suffix . : Velazul
Description . . . . . . . . . . . : Linksys WMP600N Wireless-N PCI Adapter wi
th Dual-Band #3
Physical Address. . . . . . . . . : 00-25-9C-03-82-BD
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::a906:5c45:8043:43f9%15(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.101(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Sunday, May 24, 2009 2:21:53 AM
Lease Expires . . . . . . . . . . : Monday, May 25, 2009 2:21:52 AM
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DHCPv6 IAID . . . . . . . . . . . : 335553948
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-12-20-D8-F8-00-E0-4D-7A-BA-5E

DNS Servers . . . . . . . . . . . : 65.32.5.111
65.32.5.112
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Local Area Connection 2:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
Physical Address. . . . . . . . . : 00-30-67-17-6C-FA
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 6:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : Velazul
Description . . . . . . . . . . . : isatap.Velazul
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 7:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : isatap.{328797F3-B958-47AC-8BE7-78E470765
CC9}
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 11:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 02-00-54-55-4E-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2001:0:4137:9e74:8e7:d0f:bede:8383(Prefer
red)
Link-local IPv6 Address . . . . . : fe80::8e7:d0f:bede:8383%12(Preferred)
Default Gateway . . . . . . . . . : ::
NetBIOS over Tcpip. . . . . . . . : Disabled

Does this help at all?

Gateway Support - Windows Vista - Internet/Network Connectivity

Kinda. I've already tried most of that.

Update, though: I did another hard reset, changed security from WEP to WPA2 personal. Now it works? Linksys wireless manager still says I'm not connected, but I've been consistently connected decently for the past 5 hours. Speedtest even says I have 5 mbps signal. What's going on here...

Also I can't keep it on WPA2 personal forever. I use Xbox Live and think the only security it's compatible with is WEP(which is why I had it on there before).

I didn't have any of these internet problems until after I installed a new motherboard a few days ago and installed some new drviers by the way.

It sort of sounds like the two problems are related to Linskys

I have no idea, personally. I'm not really concerned with the fact that I seem to be online(temporarily?) without interruption. I'm moreso concerned with why switching to WPA2 randomly solved my problems, and why the wireless manager says I'm offline when I'm not.