I don't know whether is still does this, but 8-9 years ago I discovered that Acrobat overwrites the COM registry entries for Microsoft Active Accessibility (oleacc.dll) such that any application attempting to instantiate MSAA gets the Adobe DLL instead of the system DLL. This actually broke the stuff I was working on and had to override it in my app manifest to forcibly use the system version.
I inquired about it and got some BS about how they absolutely _had_ to do this to intercept MSAA instantiations across the system, when in reality they were using a global solution to solve a local problem.
I inquired about it and got some BS about how they absolutely _had_ to do this to intercept MSAA instantiations across the system, when in reality they were using a global solution to solve a local problem.