Try this from the Microsoft Vista trouble shooting site at Microsoft.
was having the same symptom and also had my pst on a network driv
which became unavailable when Vista Sp1 turned off my network adapter
[image
http://windowshelp.microsoft.com/win...own_static.gif
' *I get disconnected from my network periodically.
' (
http://tinyurl.com/2ee86q)
Windows might be turning off your network adapter to save power. Tur
off the power-saving option in the network adapter's properties (wire
network adapters only)
1. Open Network Connections by clicking the *Start* butto
[image
http://www.technologyquestions.com/Q...RenderKey=XML]
clicking *Control Panel*, clicking *Network and Internet*, clicking
*Network and Sharing Center*, and then clicking *Manage network
connections*
2. Right-click the connection, and then click *Properties*
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http://www.technologyquestions.com/Q...&RenderKey=XML
If you are prompted for an administrator password or confirmation, typ
the password or provide confirmation
3. On the *Networking* tab, click *Configure*
4. On the *Power Management* tab, clear the *Allow the computer t
turn off this device to save power* check box, and then click *OK*
--
Chris en France