I use UltraVNC SC, I used the http://sc.uvnc.com/downloads/single-click/82-single-click-downloads.html to create my exe.
When I take over a screen, some programs make my remote session freeze.
It mostly happens when I take over Win7 machines.
I tested it with Firefox 5 on a Win7, which freezes the session each time when I open Firefox.
Ive been searching all over this forum, but found no solution to this problem.