what's the complete installation error message?
you could check the log files for more info, Troubleshoot install issues with log files in Adobe Creative Suite (CS6, CS5.5, CS5), PS Elements, and Premiere Elements
uninstall everything cc including lastly the cc desktop app, https://helpx.adobe.com/creative-cloud/help/uninstall-creative-cloud-desktop-app.html
clean your computer of cc files per http://www.adobe.com/support/contact/cscleanertool.html
restart your computer (don't skip this)
reinstall the cc desktop app, https://creative.adobe.com/products/creative-cloud using compatibility mode (https://technet.microsoft.com/en-us/library/bb456979.aspx?f=255&MSPPError=-2147217396)
use the desktop app to install your cc programs/trials
I chatted to the support and they made a troubleshoot on my pc to reinstall Illustrator. To stop the flickering thing I just had to delete the files com.adobe.experimentation and com.adobe.svgwriter in C:\Program Files\Adobe\Adobe Illustrator CC 2015.3\CEP\extensions and it immediateley stopped flickering. Thanks a lot for your help!