Philipw,
The short answer is yes, my slow rx problems all went away when I upgraded to Windows 7 from XP. I had average 8 year old Windows XP boxes with plenty of memory (at least 1 GB) and they were running Amazing Charts version 5 just fine. When I upgraded to version 6 on the Xp's Amazing charts rx was not usable so I had to roll back. I went out and bought all new machines and now the speed problem with version 6 has gone away. As has been said before, one shouldn't have to upgrade their hardware just because one upgraded from version 5 to 6. But that is the quickest thing to do in order to run version 6. I wouldn't hold my breath waiting for AC to fix their slow software issues. They have already said the next version will be version 7, and based on their past release history, I wouldn't expect this till 2012