Dunno at this point, its pretty straight forward to install especially on w7, I am on w7 too, as it not as wonky with read/write stuff as w10.
Only thing I can think is for you to uninstall it all delete everything.
Go in registry and delete everything to do with Tequila AND cryptic/coh see the guide.
Undo anything you did to your firewall and anti virus.
Reinstall from scratch using my magnet link in my guide, use the one in my thread further down the page near the bottom.
I mean on w7 it should be pretty easy, firewall will open a window and ask you if you want to let it through...for your anti virus make an exception for the whole install folder. Download the new tequila.xml in the guide OP see attachment to replace the one in the torrent.
Make sure you you run tequila.exe and its pointing at your install folder, revalidate for a quick update, make sure you do this while score is highlight. hit play and enjoy the game beyond that it's something on your end blocking the connection.
Dunno do you have a firewall beyond what w7 has?
Do you have some weird internet connection like that have at school that block shit?
Have a look on page 4 of my guide, I have a picture there with all the files that should be in your "City of Heroes" folder.