[chirp_users] chirp and windows 8

hello group. i have a windows 8 laptop. just recently upgraded to windows 8.1. i want to do some program editing to my kenwood thf6a. chirp and the radio cannot talk to each other because chirp tells me it cannot find the com port. it worked okay until i upgraded to 8.1. the question is, do i have to put in a new driver so that chirp and the radio can communicate. thank you Leonard