Strange problem. I don't recall ever seeing this with anyone before. I have a work laptop and it is joined to a domain. In order to log on, I need to put in my username and password. Whenever I have the laptop connected to the internet (with ethernet or wifi), I cannot log in. It sits forever at the "Welcome" screen and the blue circle just keeps spinning but it never logs me in. If I have no internet connection at all (if I unplug the ethernet cable or switch off the wifi), it does let me log in and then I can set me internet connection back up and work on it. The specs of the laptop are as follows:
Dell Latitude E6420
Windows 7 Pro (I believe 64-bit)
If you need any other info, let me know. It's not a huge issue because you see that I have a work-around but it's just frustrating that I have to disconnect from the internet to log on. The problem just started last week and I've had this computer for quite a while now.