If an instance of a restricted browser is running and minimized, you may not be able to login to the computer. You can perform one of the following to overcome this issue:
Use the keyboard shortcuts ALT+TAB to bring up the browser.
Keep the restricted browser maximized by updating the registry settings.
Set the value of DWORD MaximizeWindow as 1 at HKEY_LOCAL_MACHINE\SOFTWARE\NovellRestrictedBrowser to keep the restricted browser window maximized