Thank you. It's exact what i was looking for.
Do you know, btw, where is this options storing?
I've found the answer here: http://www.adobe.com/devnet-docs/acrobatetk/tools/AppSec/Acrobat_Enhanced_Security_FAQ.pdf
Actually, i faced this problem again, because switching off the security option is not acceptable workaround, and i need to find a better solution.
I distribute a .pdf file on DVD and provide the ability to open it by clicking a button in custom application built using old-scool Multimedia Builder.
By some reason AR XI starts in background in this case.
I've created "one-button C# application" which opens .pdf. It works fine irrespective of it's location (local or network) and location of specified .pdf.
But once i run that OpenPDF.exe from DVD-program (it could be started from local copy) - it becomes incapable to run AR XI correctly.
I even can't imaging where to start digging.
Then i check both OpenPDF.exe using Russinovich's Process Explorer, i notice, that DVDSetup.exe\OpenPDF.exe doesn't provide information about it: [Error opening process] in it's Path, Command line etc; both processes are runnig under same windows user.
If to choose in PE "Show details for all processes" both Adobe processes will be started with same params (except channel)
View image: Processes
The behavior remains with switched off / on UAC. Running DVDSetup.exe under Administration account doesn't change the result. Yeah, it worked fine on Win 7 and with AR X.
The cause is that Adobe hangs in background if it's started with Administrator privileges (with switched on Enhanced security option which is default for AR XI)
The solution: DVD-program (which requires administrator privileges) starts console program which runs Adobe under non-elevated user.