The most frequent reason for installation problems is a conflict with a running process. Please make sure that all Adobe applications, Office applications and browsers are closed during the installation. As Add-Ins for some other programs are being installed during the Adobe installation, the process may be canceled if one of these programs is running.

If a problem persists, please provide us with the complete log data of the device in question. Please use the Log Collector Tool to gather all the log data and attach the generated .zxp-data to your inquiry that you send to the IT-ServiceDesk.

https://helpx.adobe.com/de/creative-cloud/kb/cc-log-collector.html