cdc serial driver for windows 7

Hi;
I am trying to install the cdc serial driver for mtk 6582 on windows 8.1 64 bit. but i cannot find any driver for windows 8.1.
After whole day of searching on internet i every where found andriod_gadget_cdc_driver for windows xp only.

Can any one help me to install cdc serial driver for mtk6582 on windows 8.1. thanks.