I came across this the other day. It enables you to gain access to the user account "System" on a windows PC. The system account has complete control over all of the files and processes. The best part is, it can be accessed in any account, even the guest acct.
What to do.
in command, type as follows
at XX:XX /interactive "cmd.exe"
(Being a couple mins after your system time. its in 24 hr format)
if that worked, it should say : new job at __ or something similar
at the specified time, you will get a special cmd prompt with the title "SVCHOST"
Now, go to task manager and close "explorer.exe" the only thing that will close is the desktop and taskbar.
in the new svchost prompt, type C:\windows\explorer.exe
A new user called "System" will then log on.
You can now do whatever you want to write protected files ect.
To close it, Im pretty sure you have to either log of, or restart.
so say your in the library and you want to either install firefox but it won't let you, or OMG HAX the internets, but the guest acct BLOCKS TEH INTERNETS! This is a good fix. The only problem is if they block scheduling within windows. Tell me how you like it!