networking - Windows 7 - Cannot connect to university WPA2/PEAP wireless network

07
2014-07
  • user3475234

    It's not specifically me, but rather my friend who cannot connect to our university's wireless. It's specifically something with that computer, because my computer, which is also Windows 7, connects fine to the same network. What's more interesting is that the other computer was able to connect a week ago - it kept up its ongoing connection for about a week, and when the computer shut down last night, it was no longer able to reconnect.

    The authentication on my friend's user/password fails, even though the password hasn't changed, and we are using the same one that worked last week (Furthermore, the user/pass I use on my laptop to connect doesn't work on her computer). The ethernet cable which also works on my computer, gets stuck in an "unidentified network" state when used on hers.

    She is running Windows 7. I have tried restarting, holding the power button to reset motherboard, and I've made sure it acquires IP and DNS information automatically (enable DHCP I believe it was called). I've also tried uninstalling the ethernet driver, and then restarting. It did reinstall the driver, but still no luck on getting past the unidentified network problem.

    Any suggestions? Note: I cannot reset the router, because I do not have access to it. Note2: Her computer has chinese as its default language, so any error messages/information you'd need would likely have to come from command line. The one error I got from running Windows diagnostic test on the ethernet cable translated roughly to: "Local Area Connection Does not have a valid IP config".

    It doesn't matter which one works, as long as one of them can be fixed - I'm perfectly ok with it being either ethernet or wireless, as long as internet can be achieved in some way.

    Thanks in advance for any help.

    • Answers
  • seagull

    Try running this command in your command prompt (Win+R and type CMD):

    ipconfig /release

    ipconfig /renew

    Also, it's worth mentioning that the 'diagnose' feature for Windows is actually quite good, unlike most of their Help facilities; try connecting an ethernet wire and right-clicking the network icon, selecting 'Troubleshoot Problems' (not sure of Chinese equivalent but it's the top of the two options on Windows 8.)


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    networking - After windows 7 update I can see wireless networks but can't connect, ipconfig empty
  • KallDrexx

    So, last night I rebooted my windows 7 laptop and performed system updates, and ever since I have been unable to connect to any networks (having to write this from an iPad :( )

    I can see all of the wireless networks around, and the list is refreshing correctly. However, upon attempting to connect to a network it stalls for a bit (with the laptop's wireless light not blinking at all, and it usually does when transferring data). Finally, after a bit windows claims I have limited connection to the network and that the connection failed. This occurs with networks of all security levels, so it's not a wireless security issue.

    I then connected the laptop up to the router with an Ethernet cord, to no avail. I know that connection works as I used my girlfriends laptop with it yesterday.

    I then opened a command prompt and type 'ipconfig', and the only network adapter that appears is the "tunnel adapter toredo tunneling pseudo-interface", there are no LAN adapters listed.

    All wireless drivers and Ethernet drivers appear to be working in the device manager, and the only error in the system log is "The following boot-start or system-start driver(s) failed to load: vflt."

    I'm out of ideas, and now my laptop is essentially useless. Does anyone have Ny suggestions?

    Edit: So I had some more ideas last night. I attempted to restore my system to how it previously was on the 19th before the windows update, but the networking interfaces were still broken. I tried to go back to the system restore on the 17th and system restore finished with a failure message (no details, just said the system restore failed).


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  • Moab

    Use Microsoft System Restore, pick a date before the updates.

    http://www.howtogeek.com/howto/11238/using-system-restore-to-recover-your-windows-7-computer/

    Then install the updates one at a time, reboot in between each, either this will get the updates installed properly, or you will find the offending update that caused it.

    If you suspect Malware has caused this:

    Follow the order given below to properly disinfect your PC

    1.) Make a boot AV disc then boot from the disc and scan the hard drive, remove any infections it finds, I prefer the Kaspersky disc myself. The New 2010 Kaspersky disc can update the AV dat files if you are connected to the internet at the time of scan and is suggested to update before the scan.

    http://www.techmixer.com/free-bootable-antivirus-rescue-cds-download-list/

    2.) Then: Install free MBAM, run the program and go to the Update tab and update it, then go to the Scanner Tab and do a quick scan, select and remove anything it finds.

    http://download.cnet.com/Malwarebytes-Anti-Malware/3000-8022_4-10804572.html

    3.) When MBAM is done install SAS free version, run a quick scan, remove what it automatically selects. http://www.superantispyware.com/download.html

    These last 2 are not AV softwares like Norton, they are on demand scanners that only scan for nasties when you run the program and will not interfere with your installed AV, these can be run once a day or week to ensure you are not infected. Be sure you update them before each daily-weekly scan.