had a few progress bars that went 1..2...3...12..8..9 .. 15 % etc. sometimes going backwards to 9 % again. Turns out it was trying to be efficient installing something and ran the installer... Extracted the file and then ran it's updater on that file and downloaded the new version / installed. so it could extract a large file that was 7 % of the install and then drop back because it found a newer version to download...<br>got to 95% on that one and it jumped back with a 300 MB archive to 80% ...  as there was a update. :(