Default USB Teather issues....

hi all,
i have the P605 running kitkat
when i connect my tablet to either my computer running windows 8.1 or my housemates computer running windows 7 and enable usb teather the computer adds Remote NDIS internet sharing device, the whole system slows down to a crawl.... and becomes very unresponsive until i disconnect the usb cable...... on my computer i cant even do anything....
any help? maybe a free app that can be used rather then the built in teathering?
thanks