WUBI installation of Kubuntu 12.04.1 LTS hangs at Splash Screen

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http://askubuntu.com – System: Toshiba Satellite laptop: specs: Intel Pentium Dual Core 1.7 GHz, mobile Intel 965 GPU , 2 GB RAM - with Windows Vista Home Premium. (trying to dual-boot this and Kubuntu) Installed Kubuntu using WUBI (in the same folder), rebooted, then selected Kubuntu. A message says: Completing Ubuntu installation in 3...2...1 After the Kubuntu splash screen starts with the dots changing colour (black to white). When they all turn black, the whole screen hangs. I cant even get to the login screen yet. However, when using demo mode, everything is fine. So what is going on? (HowTos)