Hi, [Running Windows 10 Pro 1803 build 17134.376] Since a few days (probably after the last Windows cumulative update KB4462933), Acrobat Reader DC is no longer working. When I double-click its icon or a PDF file, the sand hourglass cursor appears for a few seconds and that's it. No error message, no main window appearing, no pdf file opening. However, 2 instances of the acrord32.exe process are created, even if I double-click only once. During each attempt, new COMRuntime errors are listed in the Event Viewer : The application-specific permission settings do not grant Local access permission to the COM Server application c:\windows\system32\svchost.exe with APPID Unavailable to the user yyyy\xxxx SID (S-1-5-21-3830724593-899982153-72885144-1000) from address LocalHost (Using LRPC) running in the application container Unavailable SID (Unavailable). The application set this security permission programmatically; to modify this security permission contact the application vendor. So it's obviously a permission problem. Which one ? I have tried multiple times to uninstall/re-install, to run it as an administrator, in Win7/8 compatibility mode, also tried the various "fixes" that can be found on the web, including the eula.exe fix, disabling antivirus, resetting the preferences... Nothing helps. So the program is now totally unusable. It seems that I'm not alone with this issue. Any other fix that would work ? Thanks in advance.
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