the game will not launch-it says that there is no disc in drive b.I am running win 8.1 with 8gig ram on an amd 4300 quad core processor with NVidia GeForce gt 730 with 2 gig video.

There's a subforum for each game. For Bad Kojo, it;s here:

https://www.gog.com/forum/bad_mojo_redux

I see a possible fix here:

https://www.gog.com/forum/bad_mojo_redux/fix_for_cd_not_present_error

Please see if that helps.

Good luck

Also next time please mark your topic as question and if a nice post like drmike's is helpful, mark it as answer. This way helpful people gain "rep", which isn't all that important, but still a nice gesture. :-)