Automatic disconnection and reconnection

Hello this it does the windows xp often a day.
It disconnects and reconnects automatic.

Event Type: Information
Event Source: Tcpip
Event Category: None
Event ID: 4201
Date: 03/01/2003
Time: 13:36:22
User: N/A
Computer: NEMESIS
Description:
The system detected that network adapter \DEVICE\TCPIP_{6E0BF092-291E-430B-BCD4-25D46969B460} was connected to the network, and has initiated normal operation over the network adapter.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 00000000 00500002 00000000 40001069
0010: 00000002 00000000 00000000 00000000
0020: 00000000 00000000


Someone tell me because this happens, I already changes 4 nic cards. I update the firmware of my router and nothing happen. I believe that I am going to format my hard disk but this it is only
one problem that giving my windows to this me.
Do you tell me what I can do to resolve this problem?
Thank you.

 

Do you have your computer set to go into Standby mode? If so, Microsoft says:

SYMPTOMS
When you place a Windows XP-based computer on standby, any currently connected remote access connections are silently disconnected. You are not prompted to disconnect manually before the computer goes on standby. This applies to any remote access connections, including connections to Internet service providers (ISPs) and private networks.
CAUSE
Windows XP silently disconnects any active connections before entering standby. When the computer resumes from standby, you must manually reconnect any remote access connections before you can use them.