Hello
Many of the problems mentioned here in forum have happened with me, but one more I dont see mentioned:
-My Win7 Ultimate 32b sometimes dont start and stay on the "Welcome" screen.
Try revert BDIS 2011 to 2010, unninstalling first BDIS2011 (yes with unnistall tool to), but when go to install BDIS2010 on the middle of installation this stop with a error tell "cant install one file, (dont remember what) see if you have administrative rights"
My luck is I have made a image backup from HDD, before install BDIS2011.
So, please teste harder your app before launch!
Fernando