I ride herd on a brace of Toshi laptops (about six of 'em) running Win7, for a client with a retail business. They seem fine after a couple years' use. Win7 doesn't like to network easily on a Class-C LAN scheme, but once it understands it can't have its own way with the other children it works solidly. They run PoS warez over a WiFi (Buffalo router) connection, server-based app's and DB.
Not so with Win8. Hateful O/S, IMHO.