We have a problem that we cannot figure out with Windows 7. In our organisation staff take laptops home which is Windows 7 Professional X64, in the office they work perfectly and have no issues as all but when they login to the laptop at home the desktop doesn't show if they are connected to their home network wirelessly. It just displays a black screen. I have looked at some of the issues that were posted a few years ago about this but the systems are running SP1 and have all the latest hotfixes. If they login as a local administrator everything works fine even when connected to the wireless at home, if they disable the wireless, reboot and login as themselves they get a desktop and everything works fine until they switch the wireless back on and connect to their home network, the laptop will then just freeze.
I can't see any events indicating any errors to why this is happening.