✔ 最佳答案
Since you have acrobat and foxit installed, IE7 should open pdf inside browser with their plugin. Now, which one you have as deafult pdf program? Adobe or foxit? I recommend setting foxit as default.
First try resetting websetting of IE to defaults. Go to properties of internet explorer, then in advanced tab, reset websettings to default. Set other things to default too.
Close IE and restart gain. It should fix things.
If not, I recommend reinstall IE7. You can simply remove it and reinstall.
As an alternate choice, I recommend Opera as the alternate broswer. it is the best and best security track record(
http://en.wikipedia.org/wiki/Comparison_of_web_browsers#Vulnerabilities).
Get opera from
www.opera.com.