Ganesh,

Your DSL-2750u Wireless N ADSL2+ 4-Port Wi-Fi Router works on 2.4 GHz ONLY.

Are you using a different network name?

On the problem system, Can you run Finding System Information REMOVE YOUR PRODUCT ID and REGISTERED OWNER and post the information back here.

 

What virus program and firewall are you using?

 

 

Rick

Hello Rick,

Please find the information from systeminfo as below

Host Name:                 ANTARIKSH
OS Name:                   Microsoft Windows 8.1 Single Language
OS Version:                6.3.9600 N/A Build 9600
OS Manufacturer:           Microsoft Corporation
OS Configuration:          Standalone Workstation
OS Build Type:             Multiprocessor Free
Original Install Date:     12/11/2013, 6:53:03 PM
System Boot Time:          6/21/2014, 9:30:14 PM
System Manufacturer:       Dell Inc.
System Model:              Inspiron 3537
System Type:               x64-based PC
Processor(s):              1 Processor(s) Installed.
                           [01]: Intel64 Family 6 Model 69 Stepping 1 GenuineIntel ~759 Mhz
BIOS Version:              Dell Inc. A06, 9/27/2013
Windows Directory:         C:\Windows
System Directory:          C:\Windows\system32
Boot Device:               \Device\HarddiskVolume1
System Locale:             en-us;English (United States)
Input Locale:              en-us;English (United States)
Time Zone:                 (UTC+05:30) Chennai, Kolkata, Mumbai, New Delhi
Total Physical Memory:     6,025 MB
Available Physical Memory: 3,927 MB
Virtual Memory: Max Size:  6,985 MB
Virtual Memory: Available: 4,646 MB
Virtual Memory: In Use:    2,339 MB
Page File Location(s):     C:\pagefile.sys
Domain:                    WORKGROUP
Logon Server:              \\MicrosoftAccount
Hotfix(s):                 51 Hotfix(s) Installed.
                           [01]: KB2899189_Microsoft-Windows-CameraCodec-Package
                           [02]: KB2843630
                           [03]: KB2868626
                           [04]: KB2883200
                           [05]: KB2887595
                           [06]: KB2893294
                           [07]: KB2898868
                           [08]: KB2900986
                           [09]: KB2901125
                           [10]: KB2901128
                           [11]: KB2902864
                           [12]: KB2903939
                           [13]: KB2904440
                           [14]: KB2911106
                           [15]: KB2912390
                           [16]: KB2913152
                           [17]: KB2916036
                           [18]: KB2919355
                           [19]: KB2919394
                           [20]: KB2919442
                           [21]: KB2920189
                           [22]: KB2923528
                           [23]: KB2923768
                           [24]: KB2926765
                           [25]: KB2928680
                           [26]: KB2931358
                           [27]: KB2931366
                           [28]: KB2939153
                           [29]: KB2939576
                           [30]: KB2950153
                           [31]: KB2953522
                           [32]: KB2954879
                           [33]: KB2955164
                           [34]: KB2956575
                           [35]: KB2957151
                           [36]: KB2957189
                           [37]: KB2957689
                           [38]: KB2958262
                           [39]: KB2959977
                           [40]: KB2962140
                           [41]: KB2964718
                           [42]: KB2964736
                           [43]: KB2965065
                           [44]: KB2965142
                           [45]: KB2965500
                           [46]: KB2965699
                           [47]: KB2965788
                           [48]: KB2966072
                           [49]: KB2966804
                           [50]: KB2969339
                           [51]: KB2969817
Network Card(s):           3 NIC(s) Installed.
                           [01]: Realtek PCIe FE Family Controller
                                 Connection Name: Ethernet
                                 Status:          Media disconnected
                           [02]: Dell Wireless 1705 802.11b/g/n (2.4GHZ)
                                 Connection Name: Wi-Fi
                                 DHCP Enabled:    Yes
                                 DHCP Server:     192.168.1.1
                                 IP address(es)
                                 [01]: 192.168.1.100
                                 [02]: fe80::7e:58cd:9d1e:e0d
                           [03]: Bluetooth Device (Personal Area Network)
                                 Connection Name: Bluetooth Network Connection
                                 Status:          Media disconnected
Hyper-V Requirements:      VM Monitor Mode Extensions: Yes
                           Virtualization Enabled In Firmware: Yes
                           Second Level Address Translation: Yes
                           Data Execution Prevention Available: Yes

I am using McAfee AV.

I would like to share an interesting observation here. Last evening (IST), I was able to connect to the modem. However, when I tried to connect to modem now, I am unable to find the same in the list of available networks. This is highly surprising that the same modem is visible sometimes and sometimes not.

Thanks,
Ganesh

Ganesh,

Your adapter works on 2.4GHz ONLY. Can you run Network Interface on one of the Windows systems that is connecting and post that information back here.

Read post 5 at https://community.mcafee.com/message/224737 This should get to your firewall settings and allow the connection.

Rick

Hello Rick,

Thanks for your wonderful support. I really appreciate your in-depth resolution process. I tried all the steps described by you. However, first I would like to clarify. While I was unable to connect to the network earlier in the day, I could connect to the Modem easily now.

The output of Network Interface from another laptop is as below:

Name                   : Wireless Network Connection

    Description            : Broadcom 4313 802.11b/g/n

    GUID                   : eb608fc4-9212-4075-9107-e5533a68bc07

    Physical address       : 20:10:7a:39:5b:52

    State                  : connected

    SSID                   : DLink_WLan

    BSSID                  : c4:a8:1d:e1:7b:25

    Network type           : Infrastructure

    Radio type             : 802.11n

    Authentication         : WPA2-Personal

    Cipher                 : CCMP

    Connection mode        : Profile

    Channel                : 10

    Receive rate (Mbps)    : 72

    Transmit rate (Mbps)   : 72

    Signal                 : 72%

    Profile                : DLink_WLan

 

    Hosted network status  : Not available

I performed all other steps as described by you. I do have one question. The radio on my modem is configured for 802.11 b/g/n. During the configuration of the network adapter, I saw one option as Adhoc 11n which was disable. I have now turned it to Enable.

Do you feel that this could be a potential issue?

Thanks,
Ganesh

Ganesh,

Some adapters work best on channels 1, 6 or 11. Channel 11 gives the best results.

Some adapters have problems connecting with AES security. If possible to select both, but you can try TKIP(Personal) Security, the adapter will probably connect.

You may have to make a new SSID so the other devices can connect. They will try to connect to the other type of security(if you did not select both AES and TKIP Security)

If you make a system restore point, the remove McAfee, using the McAfee Removal Tool then restart your computer, see if you can connect. If you can connect, then reinstall McAfee and see if you can still connect.

Rick

Hello Rick,

Thanks for your suggestions. The channel is currently in Auto Scan mode. Also, the security is TKIP + AES already. I have the choices of AES only or TKIP + AES and I have chosen the later.

Ganesh

Ganesh,

Try changing the router to channel 1, 6 or 11. I prefer channel 11 for the best results.

Also change the router from WPA2-AES to WPA2-PSK(TKIP) Security(Personal)

Rick