We've seen this on Server 2003 / XP clients that don't have any SP installed.  
If that not possible you should disable VSS for that client.

Johannes



-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On 
Behalf Of dmitri
Sent: 13. júní 2009 01:06
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] XP clients reboot and of couse fail

Terveen, Frank wrote:
> Dear ,
> Running on a 7.4.4 windows only network we have 2 Windows XP clients that run 
> a special tool for telephone taping.
> These 2 clients are defined as any ohter server in our network but when a 
> scheduled backup starts of these clients
> They reboot and then fail their backup


Check "system properties" - "advanced" - "system startup, system failure..." 
and make sure it's NOT set to "automatically restart".

Maybe your networker client crashes while starting a backup, and the systems 
are set to reboot on crash

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