I'm trying to remotely access a particular computer of mine and it seems that VNC has stopped. I can tell that the computer is still running because I can VNC into another machine on the same network and can see my target machine under the Network section in Windows Explorer and can also ping it succesfully.

To summarize:

• I own the target computer
• I am currently too far to physically access it
• Remote Desktop Connection feature of Windows is not enabled
• The computer normally runs a VNC server, but it seems to have stopped
• The computer is definitely on and connected to the network
• The computer has no password on the Admin account
• I can VNC into other computers on the same LAN

Given these conditions how can I get into the target to open VNC server, or even just reboot the target (VNC should open on startup)?

I have tried PsExec and get "access is denied", and also tried "Connect to another computer.." from the Computer Management console and also get "access is denied".