Another instance of WinVNC is already running

derek Ngai derek "at"
Fri, 01 Jun 2001 08:41:38 +0000

Thank you for asking me this simple but helpful question. I thought that no VNC should have been running because every instance of files with names containing "vnc" had been removed, and system restarted.

But then I thought twice. In the Admin Tools: Services panel, I found a mysterious "SYS_1_~1 Service" entry - no Description, unlike those Microsoft services. Here is the "Path to executable":

"c:\winnt\system32\sys_1_~1.exe" /service

Simply stopping this mysterious service solves the problem!! James, thanks for your hints!

Looking into the system32 directory curiously, I found there were 3 files:


I suspect these were neither created by Win2K nor VNC. Anyone else has seen these pieces before?

-- derek Ngai

-----Original Message-----
Date: Tue, 29 May 2001 15:07:15 +0100
From: "James ''Wez'' Weatherall" <jnw22 "at">
Subject: Re: Another instance of WinVNC is already running

> For some reasons I restarted my Win2K web server (IIS) yesterday, and the
> VNC Server (3.3.3r2) no longer worked. It said "Another instance of WinVNC
> is already running" after the first login since a Win2K restart. But WinVNC
> was *not* running.

How do you know WinVNC was not running?
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