I used version 7 to run an XP virtual machine without problems on OS X 10.8. After installing mavericks I couldn't run it so I upgraded to version 9. My OS in the virtual machine is Windows XP. Installation ran smoothly, but installing the tools failed. It keeps asking for a mouse driver called mouhid.sys supposedly on the XP install disk somewhere. The XP original disk is nowhere to be found. Why is this file suddenly needed if everything ran fine before ?