That is definitely frustrating!! I have used the Wifi sharing feature as well and ran into this exact problem.
I recommend we test it a few different ways.
First off, can you remove the security. Make it an open network, save it, and then try to connect from your pc.
Note:Change your network name as well.
Secondly, if you are able to connect and browse, then test for a bit to confirm.
Thirdly, test the different types of security to see if your pc is compatible.
Let us know.