had a similar experience updating to the previous version , first it would not seem to accept the active x control then finally when I got it to accept I click OK to begin download and nothing apeared to happen .
but the following day I was having a cleanup and went o my temp folder to clear it out . at C/Users/my name /app Data (hidden)/local/temp/..
there was the adobe installer ,It had downloaded but not gone into installation mode .I double clicked it and it installed .
a bit wierd .but maybe worth a check , if you have the same problem as I had .