In my case VSP.sys is a system file that is replaced by a modified version when the backup exec agent is installed, to make windows happy, and still be able to boot the machine I uninstalled the backup exec agent, but this leaves the modified version of the vsp.sys file in place. so I then replaced the vsp.sys file with a clean original version of it and this seems to have worked. not sure if its recommended, but so far so good.