Hi,
I've been stuck on a problem that "When using Advanced Installer to perform an install all files are correctly installed however when performing an upgrade certain files are removed" and just found the solution to do with component GUIDs.
Sorry if this is a duplicate already on the forum but I couldn't find the solution myself so maybe this will help someone else...
http://david-homer.blogspot.co.uk/2012/ ... -with.html
Thanks,
Dave