Adobe schliesst sich sofort wenn ich das programm öffne bitte um hilfe !

@valdet_5889 It sounds like a corrupted installation or a conflict with system resources or other software. A common first step is to try repairing your Adobe Acrobat Reader installation. To do this, open the Control Panel (on Windows) or go to Applications > Adobe Acrobat Reader (right-click and choose "Show Package Contents" then navigate to a repair utility if available on macOS, though a full reinstall is often more effective on macOS). In the Control Panel, go to "Programs and Features," find "Adobe Acrobat Reader" in the list, right-click on it, and select "Repair" or "Change," then "Repair" in the subsequent window. If the repair doesn't work, a clean reinstallation is often the next best step. Completely uninstall Adobe Acrobat Reader, ensuring all related files and folders are removed (you might need to use a dedicated Adobe removal tool for a thorough uninstall). 

I would use Adobe's Cleaner Tool from Adobe's website not a third-party tool. The Adobe Creative Cloud Cleaner tool is intended for advanced computer users and can fix many common problems (such as removing old Adobe software, cleaning corrupt installation files, and fixing your host files to establish a connection with Adobe servers). https://helpx.adobe.com/ca/creative-cloud/kb/cc-cleaner-tool-installation-problems.html

When you done with removing the old Acrobat Readers uninstall, restart your computer. Now go back to Adobe.com, and install Acrobat Reader to your computer, making sure you have the correct installation and latest version and not some third party website! This fresh installation can often resolve issues caused by corrupted files or incomplete previous installations.