This video is about logging in a machine with SYSTEM account. When we add a scheduled task, it runs under system account. Using the interactive scheduled task this can be achieved. The system account and the administrator account (Administrators group) have the same file privileges, but they have different functions. The system account is used by the operating system and by services that run under Windows. There are many services and processes within Windows that need the capability to log on internally (for example during a Windows installation). The system account was designed for that purpose; it is an internal account, does not show up in User Manager, cannot be added to any groups, and cannot have user rights assigned to it. On the other hand, the system account does show up on an NTFS volume in File Manager in the Permissions portion of the Security menu. By default, the system account is granted full control to all files on an NTFS volume. Here the system account has the same functional privileges as the administrator account. Please Note: This video is best viewed in full screen mode by selecting the square icon in the lower right corner of the video player.
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PsExec is part of the SysInternals suite of tools available from Microsoft.
http://technet.microsoft.com/en-us/sysinternals
Start Notepad.exe or any application of your choosing. Then launch TaskManager. Under the Process tab, you will see your application listed with a user name of SYSTEM next to it.
Nice Video !!!
Another way to run applications under System account is to use Windows Sysinternal utility called "PsExec".
It is also easy and simple to use.
I cannot test it, since i do not have any proxy configured..so even if I get into system account, not sure , how would i know , if different proxy settinngs would be used for system account or not......