hm, I only saw that when having an antivirus. Do you have DEP protection forced on all apps (on the host machine)? Also, probably unrelated but still important, you integrate IE7 after IE7 hotfixes, that's a bad combo, do it the other way around. Best is to sort by build date (click on column tab) then move IE7 last and then IE7 hotfixes below IE7 installer.