Cannot Access Other Computers When IPv4 Turned On

Aug 19, 2012

I have a brand new desktop running Win 7 64 bit and a laptop running Win 7 Ultimate.

The laptop uses IPv4 to connect, verified via ipconfig. The desktop uses IPv6. Each can see one another on the network, but cannot access one another. If I uncheck IPv4 on the laptop, I can then access the desktop PC, but cannot surf the internet. Once I click it back on, I lose access to the desktop.

I have tried connecting to both with and without homegroups enabled, but I think it's the IPv4 on the laptop that's causing the issue.

How can I get these two to play nice? The laptop hooked up wirelessly with an Aetheros AR5007EG adapter via Realtek PCIe FE Ramily controller. Can I force the laptop to use IPv6 somehow?

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I am using Windows 7 Pro and I can't access the Internet My IPv4 is working but I get this:
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Host name:
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I do have a desktop and when I ipconfig/all this is what comes up
C:Documents and SettingsAdministrator>ipconfig/all
Windows IP Configuration
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How do I access the hard drive of one of the XP computer?

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Windows IP Configuration

Host Name . . . . . . . . . . . . : Mike-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

[code].....

recently the connection rarely fails, but i bridge my internet with my Xbox 360 so i don't have to pay for a wireless adapter, and when i do that sometimes the connection fails, or when watching netflix through Xbox it says i have lost signal or the signal strength has dropped, when nothing has changed on my laptops internet connection in terms of strength?

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[code]....

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[spoiler]
[/spoiler]

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I have tried various things from forums to no avail. These things include disabling IP 6, updating my ethernet driver from the website, manually setting the IP, and disabing Avast. I do not have any firewall other than Windows Firewall and only have basic programs like Office, Itunes, Firefox.... I am convinced the issue is with the college network, but they have said their test computer was unable to duplicate my problem in my room.

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:UsersMudkip>ipconfig /all
Windows IP Configuration

[code]....

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Here are all the particulars that I think might be interesting, listed in no particular order:

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