The error message is saying that a function that used to be in the DLL is no longer there.
Windows Update Tuesday was this week. Did you do any updates?
Yes I did it, but I installed the scanner software SilverFast Ai Studio 8 too, on Wednesday
that could be the problem, between LR CC and PS CC and SilverFast ??
By the way, the old LR 5.0 Version on my desktop works perfect.
I didn't understand what happend, but now it works again
Thank you so much