As far as I can remember ,not having my octopus beside me,you can check
which com port by going to ‘device manager’ .Control Panel-System-Device
Manager ,after connecting the octopus and clicking the ‘View’ tab,then ‘Devices by connection’,scrolling through the tree and opening the various usb tags,your com port is probably 7. This is explained in the pdf for the driver instillation.
Sounds like maybe reinstall the driver.