For a better understanding of the issue(s) reported, we would like to know first if we are dealing with two different issues here.
1 - Are you experiencing issues with your wireless connection such as disconnections or wireless adapter not detected or not connecting or the issue lies with your WiDi connection?
2 - Before you tried to connect WiDi, Can you tell us if your internet worked normally before any attempt to install any drivers?
3 - If you have installed any drivers, where did you install them from?
4 - What is your wireless adapter?
Now, regarding Windows 8.1*, It comes already with WiDi capabilities and there is no need to install any drivers to connect. Please click in these links for further information on this connection using Windows 8.1* : Intel® WiDi Software Setup for Windows* 8.1 - Introducing Intel® WiDi on Windows 8.1
Let us know if this information about our Intel® WiDi helped you.