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Archive for the ‘Network Troubleshooting’ Category

The full title of this Knowledge base article is “You may experience connectivity issues or performance issues when you connect a mobile PC that is running Windows Vista or Windows 7 to a wireless access point”.

You may experience random connectivity issues when you connect a Windows7 or Windows Vista-based mobile PC to certain Wi-Fi “hot spots.” These connectivity issues include the following:

• The wireless network connection is dropped.
• You experience poor performance.

You experience these issues if the computer is running on battery power.

Note You may also experience these issues when you connect a Windows 7 mobile PC to a wireless access point (AP) in a small office/home office (SOHO) environment or in an enterprise environment.

This issue occurs if the Wi-Fi hot spot uses wireless APs or routers that do not support the 802.11 power save protocol. This issue occurs because of the power saving features that are included in Windows Vista and Windows 7. The default power plan that Windows Vista and Windows 7 uses for a mobile PC is the Balanced power plan.

Refer to the for more information and a workaround.

The full title of this Knowledge Base article is “You cannot modify the Hosts file or the Lmhosts file in Windows Vista and Windows 7″.

When you try to change the Hosts file or the Lmhosts file in Windows 7, you may receive an error message that resembles either of the following.

Error message 1:

Access to C:\Windows\System32\drivers\etc\hosts was denied

Error message 2:

Cannot create the C:\Windows\System32\drivers\etc\hosts file.
Make sure that the path and file name are correct.

This issue occurs even though you log on by using an account that has administrative credentials.

Refer to the for a workaround.

Virtual PC 2007 is free software from Microsoft. You can get both a 32-bit and 64-bit edition here.

For those of you who don’t need a step-by-step walk-through for correctly setting up NAT in a virtual machine (VM), the solution to get NAT working inside the VM is to set the IPv4 DNS server to the virtual gateway’s IP address, 192.168.131.254.

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