I'm looking for a software that can be installed on my computer that sends a notification with details to my cell phone, if I or others log in.
closed as off topic by DragonLord, Randolph West, Nifle, Renan, 8088 Sep 17 '12 at 2:34
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Android has a pretty cool solution, see this article. It also depends on your phone. If you have an iPhone you might need to try something else. If you are worried about physical security, why dont you just create different accounts for every user?
I can't think of anything offhand that would do this (though i could have sworn I'd seen it in a movie ;p), but it should be fairly trivial to throw something like this together.
In order to run a task at startup or logon you can use task scheduler. In windows XP you only have the option to run the task at startup, but in windows you can run it at login as well.
You'd then need to actually contact your phone - you could probably throw together a script with blat to send an e mail, or run some other custom software. It wouldn't be realtime, but close enough.