I am trying to download the compatibility patch for AOE HD, and have it installed in 2 separate drives. I have my A drive and a C drive. (SSD= A, C= HDD). I have tried downloading the compatibility patch and applying it to both, but when I launch the lobby, it still is saying "a game installation problem has been detected," telling me to install the 1.0c compatibility patch for Age2HD. What are some common errors I may be doing wrong here?

Here is a guide if you need: https://support.voobly.com/display/vkb/KB1054+Clean+installation+of+Aoe2HD+with+compatibility+patch

Note: The Compatibility Patch needs to be installed to your Age2HD folder.
_{C:\Program Files (x86)\Steam\SteamApps\common\Age2HD}

Hope it helps!

PS. C:\Program Files (x86)\Steam\SteamApps\common\Age2HD\age2_x1\age2_x1.exe is the file that the Compatibility Patch will create and the file that Voobly needs to locate!

same problem

got the solution, the problem is in the installation manager, when you explore your age2hd folder and select it, the installer adds another /age2hd, so it gets : ..../age2hd/age2hd , and then its an unsucesfull installation. I had to select the "common" folder then the installers adds automatically the /age2hd and it works.