I compiled a list of all of the available hotfixes for App-V 5.1. I noticed the official Microsoft list isn't complete and didn't see any other single list. I figured if I had to troll for these links, this could save somebody else from doing the same.
Some of these links take you to a forum to put your e-mail address in to get a link to the actual download. I didn't want to give the direct link as Microsoft may have some reason for wanting to track these downloads.
Hotfix 1: https://support.microsoft.com/
en-us/help/3115834/hotfix- package-1-for-microsoft- application-virtualization-5-1
Hotfix 2: https://support.microsoft.com/
en-us/help/3139245/hotfix- package-2-for-microsoft- application-virtualization-5- 1-and-hotf
Hotfix 3: https://support.microsoft.com/
en-us/help/3144445/april-2016- hotfix-rollup-for-microsoft- desktop-optimization-pack
com/en-us/help/3172672/ detours-library-fix-for- microsoft-application- virtualization
Hotfix 7: https://support.microsoft.com/
en-us/help/3198158/december- 2016-servicing-release-for- microsoft-desktop- optimization-pac