Have you ever wondered how the AX Hotfix / Service Pack installer detects existing AOS instances?
These information can be found in the Installer Registry under the following Registry Key:
Every AOS Instance has it's own class Id.This class id looks like this FA15D12F8BB2D1C4282780DBCF31Axxx (where xxx is a uniqe number).
For example: If I have 2 AOS instances on my machine then I may find the following registry keys:
Additional informationIf those keys have a subkey named Patches then they are marked as updated.The entries in this subkey contain information about the applied patches.