For better understanding and reproducing I have written this vbs script. It should open the sysinternal process explorer on a unc share, which has been mapped before. Set WSHShell = CreateObject("WScript.Shell") Set WSHNetwork = CreateObject("WScript.Network") On Error Resume Next WSHNetwork.RemoveNetworkDrive "K:" WSHNetwork.MapNetworkDrive "K:", "\\srv01\d$", False, "user1", "password1" On Error Goto 0 WSHShell.Run "\\srv01\d$\procexp.exe", 1, True When I run this script, it brings this error message: Line 9 ... The system cannot find the file specified. Code: 80070002 When I adapt line 9 like this WSHShell.Run "cmd.exe /c \\srv01\d$\procexp.exe", 1, True or like this WSHShell.Run "k:\procexp.exe", 1, True everything works like expected. With WinPE 1.6 running the script also works fine. I searched the forum for this error but it seams that this behaviour was not posted before. Also changing zone information in the registry like described on: http://support.microsoft.com/kb/303650/en-us does not change the situation. Has anybody the same problems? Cheers Marc