FTDI drivers stopped working com port does not show up HELP!

ok i just figured someone here would know ,i just plugged it into my win 7 32bit machine and it works on that machine
i didn't do anything to my win 8.1 machine i didn't install any new hardware or mess with any drivers at all
i find it really strange that it detected it and it worked a few weeks ago and after reboots and unplugging it and plugging it back in it still was working fine now it just all of a sudden does not work , it's really weird
also i can find instruction for win 10 and win 7 but not for win 8/8.1

i would really just like to know how i can get the PC to make it like it was never connected
i just want to know exactly what drivers and devices i need to delete to make it like a fresh start so windows will detect it and automatically install the drivers again