Comment 49 for bug 804936

I forgot to add that the notebook is synchronized between two computers, but they are rarely, if ever, used at the same time, because I'm usually on both ends. One computer always presents the problem, the other never does. Here is what I can tell of the specs of each computer:

Problematic computer:
--------------------------
Windows 7 Professional x64
HP notebook (2012)
Intel i3 CPU
4gb RAM
320gb Samsung HDD
Avast free antivirus

Computer that never displayed the problem:
--------------------------------------------------
Windows 7 Professional x64
Lenovo notebook (2007)
Intel Core 2 Duo CPU
2gb RAM
80gb Hitachi HDD
Panda free antivirus

Now this last computer is running Linux, so I can't try to break it any longer. I have another Windows 7 machine, though, and when I used Zim on it, it also didn't present the problem, even though it was also synchronized. Perhaps Avast is the problem? Both of my machines that worked used Panda.