"Do you have any firewall or anti-virus software running in the background at all? Just thinking out-a-loud. Can you also try running the exe using ''run as administrator''? "
yes i did run as admin, i am logged in as admin too,
no virus software or any other, as said the v6 and v7 install4rs fo corona and also the c4d r25 installer work fine on that machine, ONLY not the beta v8.
i in meanwhile did manually copy the files on the right poisitoins and corona works now, but i waqnted just to point out the installer gives this issues, despite i have de installed and re installed the c++ redistributables.
i can try the mdl line at a later point
the link in second post not helps, i can run any other exe on that pc, several software is installed and works fine, it is not a fresh pc, it runs more than yy year and has also older corona versin installed, so must be some specific with the v8 installer
best
Stefan