I would recommend deinstalling all B&O applications including their directories. Or using a restore point prior to the installation
You mentioned BeoPlayer? Please check that you have downloaded the correct software and using BeoPort version.
Then install BeoPort taking care to plug in the Beoport to the PC USB only when asked by the installation process and not before otherwise it will not install correctly and not function correctly.
Good luck
BV10, AvantDVD, BS3000, BL8000, BL6000, BL4000, BL3500, BeoPorts, BC9300, BC7002, CX100s, C75s, Beo4s, BC6000s, LC2s, A9, A8s,