Automatic wake up from Hibernation/Standby

[Rincewindwiz]

This is Driving me nuts.
Laptop Tecra M5 2GB XP Pro SP3 Internet via router (wireless and/or wired)
Pc-Cillin 2007; a-squared, Spybot with latest updates

If I put the machine into hibernation it automatically restarts some 15 - 20 minutes later
The computer is not connected to anything - no power, no network, no mouse, nothing - and is not moved during the period.

All 'allow device to wake up' settings are disabled and powercfg.exe confirms there is nothing that is 'wake up armed' (powercfg.exe /DEVICEQUERY wake_armed returns NONE)
The wireless LAN is switched off; There are no scheduled tasks; The BIOS settings (Alarm, Wake up for LAN, Critical Battery) have wake up disabled and The event log has no entries relating to the restart.

If I put it into standby more or less the same thing happens.

Hibernation/Standby used to work but for various reasons I had to restore an old backup and reload most of the software. (I canot guarantee that exactly the same software is loaded as before.) Since then hibernation/standby has not worked

Any suggestions very welcome.

 

[Rincewindwiz]

More recently I have been getting
The browser has forced an election on network \Device\NetBT_Tcpip_{C3C55AFE-2623-426F-88F5-A69C323DC2F9} because a master browser was stopped.
as the first event after the wake up.

Does this mean the browser has activated the network card and thus woken up the machine

 

[Rincewindwiz]

So I have disabled WIA, put the macine into hibernation and then, when it wakes up automatically, the event log message is :-
DCOM got error "The service cannot be started, either because it is disabled or because it has no enabled devices associated with it. " attempting to start the service StiSvc with arguments "" in order to run the server: {A1F4E726-8CF1-11D1-BF92-0060081ED811}

BTW stisvc is the same as WIA.
A search through regeit confirms that A1F4E726-8CF1-11D1-BF92-0060081ED811 refers to StiSvc

Which is fine, but how do in find out what has started DCOM?