All wireless adapters need to be set up to match the Wireless settings of the Router they're going to connect to. Especially Intel Adapters.
1. Access your Router Admin Panel, then note the Wireless Mode, Standard/Wide Channel, and other settings.
2. Assuming you're using a Vista machine: go to Control Panel, Network/Sharing, Manage Wireless Networks.
3. Click on Adapter Properties.
4. Select the Advanced tab, then check and modify the settings to match your Router:
Check and adjust the following settings:
(those I've not listed are user's option based on Router settings)
802.11n Channel Width - Set to match your Router's Standard Channel.
802.11n Mode - Set to "Enabled" if your Router's Wireless Mode is set to N only or Mixed. Disabled if set to Wireless G or anything else.
Ad Hoc Channel 802.11 b/g - 11
AH Power Management - User choice (Mine is Disabled to prevent the system from shutting it down)
AH Quality of Service (QoS) - WMM Enabled if using QoS setup on Router. Disabled if not.
Roaming Aggressiveness - Highest
Throughput Enhancement - Enabled
Transmit Power - Highest
Wireless Mode - Either 3, 4, 5, or 6 if N mode isn't enabled.
When enabled, it doesn't matter. If Router is set to Mixed, then
choose B/G, B/G/N, etc. If set to Wireless G, the set to G.
Click Apply, then Okay. Restart your system and do a POR on your Router. Remember to keep it unplugged for at least 30 seconds before plugging it back in.
Go to Network and Sharing, then remove any existing profiles. Setup new ones, scan for your SSID and connect to the Router. On the Network and Sharing window, click on Status to the right of the Connection label, then verify that your signal strength & network speed is consistent with the setup.