This appears to be a recent error in AVG.

For some reason AVG has started complaining about software which is
protected (from piracy) with the yoda encryption system. This type of
encryption is entirely normal for commercial software packages.

WinTopo Pro is protected with the yoda encryption system. It is
nothing to be concerned about. It is not an 'infection'.

You should always ensure you download WinTopo from the www.wintopo.com
website or this Yahoo Group repository.

You might also try using a more reliable anti-virus solution.

From: The WinTopo Support Team.

--- In wintopo@yahoogroups.com, "Pedro Aroso" <pedro_aroso@...> wrote:
>
> Now, every time I open my pc, my AVG anti-virus shows this warning:
>
> "Multi thread detection
> C:\Program Files\SoftSoft\Win Topo\win Topo.exe\Runtime packed yoda"
>
> I was unable to "Remove selected infections", so I did uninstall the
> program, but it still appears on "All programs".
> Any help would be welcome.
>
> Pedro Aroso
> Porto - Portugal
>