Why is it that when I start blender, the 3dview is spinning? I have to reboot windows to stop it

This has happened a couple of times. Thanks

My guess is that you may have some keyboard issue.
Maybe one of the numpad keys is locked in pressed position (2, 4, 6 and 8 keys are used to rotate the view).

Thanks for the reply Lucas-pl. It has not happened again since I posted.