If you are at a user's workstation and the user is not there but currently
logged on with applications open, it is not a good idea to close them up
due to the possibility of lost information or work that has not been saved.
Instead, use the runas command. If you need access to a file share that is
not accessible by the user, you can open explorer as an admin or user with
the appropriate permissions.

	runas /user:%computername%\administrator "c:\winnt\explorer.exe"
	runas /user:domainname\username "c:\winnt\explorer.exe"

You can also navigate to the explorer.exe file, right-click it while holding
the Shift key, then choose runas. All processes spawned from this instance
of explorer will run with the privledges of the user that you designated with
the runas command. The runas command can also be implemented for the
administation tools snap-ins.