I have a copy of Windows XP Tablet Edition on my Viewsonic Tablet PC.  All was well but now it just does not boot up ata ll.  It gets to the stage of asking if I would like to start up in Safe mode, Last known good configuration etc.  When I select Sae mode it gets as far as loading up to //windows/system32/drivers/mup.sys then freezes before restarting itself.  Are there any solutions to fix this?

Thanks