NIK 5.7.0 installation stalls at 61%. This is the point where the old version is supposed to be removed. The splash screen has to be deleted in Task Manager but returns the every time the computer is started. It also identifies itself as being a 32 bit program while I have 64 bit W10.
Thank you Egregius;
I have waited overnight. The following morning. It is still at 61%.
It identifies itself as being a 32 bit file in its title.
Only the previous version of NIK (5.6.1) is installed.