Cannot connect to router through wifi, but others can

[SDELT1]

I have a Lenovo X240 running windows 7 64Bit with a N-7260 wifiadapter.

I cannot connect to my home router, my brothers router or my girlfriends router.

I get error"Windows is Unable to Connect to xxx"

Every body else can connect.

I can connect to other wifi networks.

I tried disabling antivirus and firewall software

I tried resetting the router

I deleted all wifi connections and tried from scratch.

No luck

[ASouz7]

DELTA_Support,

1 - Did you connect before to these particular routers?

2 - What are the other Wi-Fi you can connect ? public, private, corporate?

3 - Is this the original wireless card that came installed when you bought this computer?

4 - Have you checked for recent BIOS update?

5 - Do you remember any particular change in the system prior to this issue?

6 - What kind of routers do they have ? Brand and model ?

7 - Are you trying to connect at 2.4GHz or 5GHz?

8 - Can you provide the exact error message you get when you try to connect to these routers?

You may want to take a look at these links as they may help you resolve this issue.

http://www.intel.com/support/wireless/wlan/sb/CS-025332.htm Intel® Wi-Fi Products — Resolving Wi-Fi Network Connection Issues

http://www.intel.com/support/wireless/wlan/sb/cs-006205.htm Intel® Wi-Fi Products — Power Save Polling (PSP) Causes Connection Issues with Access Points

http://www.intel.com/support/wireless/wlan/sb/CS-034875.htm Intel® Wi-Fi Products — TechNote: Access Point Interoperability Issue with uAPSD

http://www.intel.com/support/wireless/wlan/sb/CS-006321.htm Intel® Wi-Fi Products — Access Point (AP) Firmware Updates May Resolve Wireless Network Issues

[SDELT1]

1 - Did you connect before to these particular routers? Not with this computer. It is new

2 - What are the other Wi-Fi you can connect ? public, private, corporate? Corporate with WEP security

3 - Is this the original wireless card that came installed when you bought this computer? It is the original

4 - Have you checked for recent BIOS update? Yes, we always install the newest Bios

5 - Do you remember any particular change in the system prior to this issue? No. The computer is new and have never connected to these wifi's

6 - What kind of routers do they have ? Brand and model ?

SagemCom – TDC HomeBox

Technicolor TG788vn v2

Linksys WRT54G

7 - Are you trying to connect at 2.4GHz or 5GHz? Mixed mode

8 - Can you provide the exact error message you get when you try to connect to these routers? Windows was unable to connect to "Network name"

[ASouz7]

DELTA_Support,

Did you check any of the solutions provided in the links sent to you previously ?

Since this card is the original one, we recommend first that you check with the the OEM (Original Equipment Manufacturer) to see if they have any specific drivers that might resolve this issue. It can't connect to yours, and neither your brother's nor your girlfriend's routers but have you tested if it can connect to a public network or any other besides the corporate one and those you have mentioned before?

Where did you buy this computer? When looking for more detailed information on the routers, we found out that the information provided is in Danish for SagemCom – TDC HomeBox, Italian for Technicolor TG788vn v2 and English for Linksys WRT54G. Based on this and considering the region where the computer comes from, there might be regulatory rules that could also prevent your computer to connect properly. Please check this link to see if this is the case: http://www.intel.com/support/wireless/wlan/sb/CS-006064.htm Intel® Wi-Fi Products — Moving from One Regulatory Domain to Another and Channelization

On our best effort to help you, here are the recommended setting for the type of adapter you have: http://www.intel.com/support/wireless/sb/CS-030709.htm?wapkw=wifi+recommended+settings Wireless Networking — What are the Recommended Settings for 802.11n Connectivity? and also, http://www.intel.com/support/wireless/sb/CS-029893.htm Wireless Networking — Frequently Asked Questions - Wi-Fi - you can also try the following:

1 - Disable Bluetooth* as it uses the same antennas utilized by WiFi connection.

2 - Set the power plan setting of the wireless adapter to maximum performance. This is done in the advance configurations of the Windows* power plan.

The latest drivers found in our support site are generic and may not be compatible to your system requirements that is why we recommend to always use the computer manufacturer latest drivers even if they are not the latest if you compare to those of our support page but they are the right ones to make sure you can connect.