you sound like you don’t have keyB control outer also on the Operating System, i.e. the "grub menu screen" this means your BIOS settings for your USB devices are incorrect, confirm they are connected properly. Eg similar to on newer BIOS verify the "USB legacy setting".

If you have already uninstall Ubuntu boot your system from a windows CD, then type as fdisk /mbr in RUN command address bar this will reorganize the master boot record then as you like paying for software go out and buy a copy of partition magic and resize/reformat your drive back to what they where Gpart live CD does the similar thing for free, but it support Linux. If you where having problems with Bluetooth within Ubuntu’s login screen to fix the Bluetooth keep out at startup problem in Ubuntu 8.10 and 9.04. (I thing this is only needed for Bluetooth devices that don't maintain HID thing)

unplug the Bluetooth adaptor and after that plug it back in, (this should give you KeyB and mouse control) and after that login and edit the file on the Ubuntu system located here/etc/default/Bluetooth like this go to the terminals and type sudo gedit /etc/default/Bluetooth change this line from

HID2HCI_ENABLED=1 To HID2HCI_ENABLED=0

And after that you reboot your system and KeyB will be going on.