Not much help, unless there is comfort in knowing we have the problem also. Out of 7 stations we have only one user who experiences this issues, running 64 bit Vista. It really appears to be more of a Windows issue than a Pro/E issue. We upgraded to Pro/E 5.0 and the problem doesn't seem as bad, soon we'll upgrade to Windows 7 and hope for the best. It just seems to be how they share and release resources. Like I said, probably not much help. Bruce