Just got caught up on the latest updates. Very impressive work. Its great to be able to see the total process you use for design the parts. Keep up the good work.
What version of windows and IE are you running? Might be an issue with one or the other. Might check to see if anybody else is having issues with the same versions..
A new bug has been found in IE ver 6 to 11 which could allow hackers to take over windows. However MS will not be providing a fix for XP because it is no longer being supported.
The solution is to go to another browser like Firefox or Chrome.