pcns

PCNS uses LogMeIn Technician Rescue so it's possible to perform cursory inspections of your Internet connected PC (broadband connection recommended), without the need for always connected, less secure, resource consuming remote agents like Real VNC, WinVNC, or PC Anywhere. No holes have to be punched in your firewall or router. When the remote session ends, the remote agent performs an orderly shutdown.

Newer, free solutions, such as WinVNC over Network Streams, allows a technician to connect to your PC anytime, whether you want them or not.  Crossloop's free remote control service require's user permission to launch, however Crossloop runs all the time.

In some cases, it's feasible to diagnose your PC via remote control. This can be used either in concert with or as a substitute for an onsite visit, depending on the nature of your PC problem.