cannot communicate with primary dns server - Vista Suspend/Sleep/Standby issue

Since I upgraded my system to Windows Vista Home Premium (from XP), I started facing internet connections issues after waking up my system from Sleep Mode or Standby Mode. When it comes back from any of these modes, I use to get an error message saying “cannot communicate with primary dns server” but when I use to check my connection, I see my IP Address and DNS servers are proper.

After struggling with this problem finally I found a solution which fixed the problem permanently. So If anyone of you guys facing the same problem and looking for solution, just go through the following:

• Right click “My Computer” icon from the desktop and select Manage.
• Click Device Manager from the left of Computer Management Window.
• Right click your network adaptor and select properties
• Click Power Management tab
• Select "Allow the computer to turn off this device to save power."

That’s it. Problem fixed.

Thanks for sharing that useful info Destiny. Here is yet another solution that helped me to fix the same problem.

• Go to the Control Panel.
• Select Classic View in the left pane.
• Double-click Power Options.
• Go to the current power plan and select Change advanced power settings.
• Select Change advanced power settings.
• Scroll down to the bottom of the list.
• Expand Multimedia settings.
• Expand When sharing media.
• Click on the setting so that it changes to a dropdown.
• Select Allow the computer to sleep.
• Click OK.
• Close the Edit Plan Settings window.