Is there a way to search for a file on a computer (all disks) and return the full path so I can execute this file?

It's acrord32.exe. If I use shellexecute to open a pdf with a freshly installed Acrobat Reader 4.05, It freezes because Acrobat was not opened alone to display the EULA (the screen where you need to "accept" or "refuse" to use the software).

TIA