It was loaded with good appliction programs.
But then the bloody operating system itself got full of viruses.
So the application programs can't function optimally.
System often crashes.
The basic security system of the machine tries to qaurantine itself from other humans in the network.
When the internal security system is off-gaurd for some time, sytem driven by its most basic hardwired routines, pings other network resources. They respond. But over time their security sytems sense the virus signature patterns and disable connection.
Over and 'out'.