The best solution is that. First, notice that the problem is about windows and "windows photos" app which have some issues to open ico files. The adobe reader ico files are not corrupted in folder c:\windows\installler\AC76BA86-7AD7-1036-7B44-AC0F074E4100\ The solution is adding an 3. party photo viewer to windows. I use irfanview photo viewer at all. its free and usefull. (I use it all image types, that's your choice) Make irfanview to be default program for opening *.ico files. and then restart windows. Thats all. Now you see that start menu and taskbar tiles are became show adobe icons. Sorry for bad english, moderator can correct the writing.
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