Shutdown Scripts?

You really need a script to do the backup and then call the shutdown, no way to keep a connection alive afterwards. An Alternative would be to set a long enough delay to cover the backup time in the power settings. Then you could run the script and leave the machine to shut itself down or hibernate after that time.

The best way to do this is to join the machine to a domain and map the My Documents folder to a network resource, this way they are always there.

Another way you can do this is to simply map a drive and store your files there, then there will be no need for a script. Right click My Computer and click Map Network Drive.

If you are stuck on using a logoff script then you need to be joined to a domain and set the logon/logoff scripts in Group Policy. Microsoft has a ton of scripts on their site.

http://support.microsoft.com/kb/324803/en-us

http://support.microsoft.com/kb/198642

Here are a couple of sites that will help you with writing scripts:

http://www.computerperformance.co.uk/Logon/Logon_H...

http://www.amset.info/loginscripts/default.asp

Try local policies. It's a bit complicated to give you much detail here. Run gpedit.msc. Open User Config then Windows Settings. You'll see logon/logoff scripts. Be careful what policies you edit. You could lock yourself out of your system! Hope this helps get you started.