No problems here. Windows 11 Pro. Per SOS notice this has built in serial code. Fast d/l, install. About shows register via SOS license. Can see this useful to help organizing large photo collections. Do have to hope Vovsoft keeps it free. Have had a few of their apps go into Trial in past from Free. Could be due to MS update or a change of a piece of h/w. And couple times I lost access to the boot sector of OS on SSD. Had to rebuild that and resulted in some logins & apps thinking new PC. Maybe some s/w is more picky after such a factor.