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17 posts


#27029 10-Oct-2008 19:01
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Hi Every One,
After spending couple of days on this issue I figured out i cannot fix it w/o any expert help. Below is the complete description of problem:

OS:    Windows Vista Home SP1 (Updated till October 10, 2008)
Machine: Compaq Presario CQ 50
Additional SW: Bit Defender Internet Security 2008, MS Office Home & Student 2007

Problem: When ever I tried to Dialup Internet it gives this error "Registering your computer on the network" "Error 720"

Workdone:  1. Wireless, LAN connections are OK, I tested it both get on to the Internet w/o any problem.
                  2. Reinstalled Modem Drivers
                  3. Refreshed TCP/IP stack
                  4. Restarted DHCP services
                  5. Microsoft Knowledgebase says TCP/IP protocol not binding on the Dialup connection.
                  6. Updated modem drivers
                  7. Phone cables, jacks changed.
                  8. Blah Blah Blah

I can understand Vista is not good for dialup, but dont have any other choice.

I am lost, Did confirm from my ISP they see Auth OK at their Radius servers log for my account. Every thing is fine at there end.

Any help from Guru's????????


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BDFL - Memuneh
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  #170497 10-Oct-2008 20:25
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It looks like something corrupted TCP/IP. Here are some instructions.



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17 posts


  #170503 10-Oct-2008 20:32
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Thanks freitsam...

But this post is for win2k, I am running win vista,
I also tried "netsh int ip reset" in eveluation mode but still problem exists, You are right TCP/IP stack is corrupted but can't figured out how to reset it for dialup. Did experimented on LAN & WLAN it was successful. Finally uninstalled Bit Defender, stopped Win FW, still no luck...



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Master Geek

  #170506 10-Oct-2008 20:46
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Forgive me if you've already tried this but have you completely re-installed the TCP/IP stack by removing and then re-adding it in the Windows components section of "Programs and Features" I think it's called in Vista, (I forget as I don't use Vista much, I prefer Linux) either way in the control panel, whatever they've changed the very obvious "Add/Remove Programs" to is where you need to be, then add/remove Windows components and remove the TCP/IP stack all together, it'll be in networking components and may not use the word "stack". You may need your Windows Vista disc to re-install the stack so don't try this without it please.

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  #170515 10-Oct-2008 21:29
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Spark FibreMAX using Mikrotik CCR1009-8G-1S-1S+. UAP, UAP AC Pro, UAP AC Pro Mesh, Apple TV 4, Apple TV 4K, iPad Air 1, iPhone XR, VodaTV Gen 2. If it doesn't move then it's data cabled.

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  #170517 10-Oct-2008 21:34
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Hi Hollow & Spyware,

I had already tried this stuff, WIN is always been frustrating for me being Linux/BSD guy, It is giving me tough time again with silly stuff...
Reinstalling the windows is never been the option, I hate it...


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