Fritz 13 - Chess Playing and Analysis Program (PC-DVD)
I bought the Excalibur Fritz 13 version and it is an absolute nightmare.
Activation repeatedly failed - indeed it took several months before I could activate it successfully.
Having done so I ran the update option but this failed mid way through the setup.
I was left unable to use the program at all.
I am going back to my previous purchase from way back - Fritz 6 which works fine even after all these years.
Chessbase- you must have a death wish.