Ubuntu crashes at login screen

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http://askubuntu.com – I'm completely new to Linux and wanted to give it a try. I installed Ubuntu using the windows installer. After rebooting the PC it automatically boots into Ubuntu and get the first time run screen and then the login screen. At first the cursor won't move, or just sometimes. After a minute or so it moves like it should but nothing else works. I can't click anything and the clock remains on the same time. When I hard reset the PC and select Ubuntu I get a message: TRY (Hd0,0): NTFS5: No wubildr TRY (Hd0,1): NTFS5: error "prefix" is not set This is only for a split second. After this I get (HowTos)