Melbourne, Aug 12 - A teenager who is accused of stealing a laptop and surfing pornography in this Australian city was arrested, thanks to a software that would send an e-mail whenever the laptop was connected to the Internet.

The 18-year-old 'thought he was home free after evading police for two months, but he came undone when he logged on to Facebook', The Age reported Wednesday.

The laptop was reportedly stolen from a staff member of ladder manufacturer Branach in the vicinity of Narre Warren, in Melbourne's south-east, June 8.

Branach is a client of Sydney-based managed IT support firm Navigatum, which can connect to and control any of Branach's laptops and diagnose technical problems from anywhere.

Using remote access software called Kaseya, Navigatum senior network technician David Stevenson set up an alert so that, whenever the stolen laptop was used to log in to the Internet, the software would send him an email.

'I can tell when he's online and from there I can jump on to my laptop and start watching what he's doing,' Stevenson was quoted as saying.

'We were watching him for a little while but, because he was logging on at really random times like really late at night, we set up some scripts to capture (screenshots of) what he was doing on the screen every 30 seconds, and that was then uploaded to our server.