You did right to uninstall it, McAfee is pretty bad at handling network connections. McAfee - Resolving the recent update issues with McAfee Consumer Products
Or we can try another approach.
First thing to do is to open up Control Panel
and then in to Network and Sharing. If your control panel has been left at the default view (Category) this will be in Network and Internet
. The top option is Network and Sharing Center
. Click it.
If you've set your control panel to either small or large icons though, then we can just head straight in to the N&S Center without delay.
In here we can view a whole slew of information about our current connection, but forget half of it because it's about as useful as hiring a dead hooker in a mafia den if the adapter can't talk to the router in the first place.
On the very left hand side you should see Change Adapter Settings
. Click it and let me know any icons for network adapters it displays. Or screenshot it; either is good but pictures speak a thousand words per minute and type even faster.