"It could be your mouse settings. Your keyboard is set to move the cursor with your number pad.
To Slove this issue
Go to System > Preferences > Accessibility > Keyboard Accessibility Select [x] Enable keyboard accessibility features Go to the tab Mouse Keys and deselect [ ] Enable keyboard accessibility features.
similar to article: http://arcanecode.com/2007/04/25/ubuntu-704-and-virtual-pc-2007-mouse-issue-workaround-sort-of/"