I received the LiDE400 today and after a good 2 hours I couldn't get the scanner to work (Windows 11). I have tried different drivers including compatibility mode according to many tips - without success!
The scanner can be operated with Win-11. The installation of drivers and software is mediocre. The scanner user interface is poor. It works, yes, scanning is possible but with far too many restrictions. Compared to the earlier Canon versions, this is a significant step backwards. What was previously possible in one step now requires several steps and even then only with compromises. What a pity.