The problem you are getting is another issue completely and maybe best to open another post.  I cant really say what would be causing it but I'll give you a few tips you can try out: 1. Terminate all non-essential processes as other programs may interact with the browser. 2. Check if you have any plugins loading up (managed addons in IE settings) and see if u can disable them 3. See if you can drag and drop a pdf file in the browser and if it opens up 4. Disable "Display PDF in browser" in Adobe preference settings and see if it makes a difference 5. Disable Adobe's "Protected mode" and see if it works. If so you'll know its related to Adobes sandbox. I've seen that not all sandbox issues do get logged to its log file, if disabling does make the issue go way you might need to wait for the next Adobe Readers update which is due in June and hopefully they'll fix it. Good luck ... View more