On the server, run FSMGMT.MSC and check the MAS share to see if anyone remotely is touching PVXWIN32.EXE. If there's nothing there, download and run Process Explorer (http://live.sysinternals.com/procexp.exe). When it opens, go to Find \ Handle or DLL, then type PVXWIN32.EXE and hit Search. This should (hopefully) give you the process on the server that is touching the file. If there's nothing there either, then it's a SY0CTL thing...