|A few ways. |
One is a special TV out that came with the computer.
If not installed then you need either a gizmo to convert PC video to TV
Or a new video adapter that can produce TV out signals.
Otherwise you need a TV that already has a PC input.
"Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10