Actually, the copy will only work if the user ahs permissions to copy into the %WINDIR% directory. Since most user do not have the required admin permissions, it'll fail. Thent he script call will fail, too since the executable is not present. For correct login scripts, see for example Mixed Win9x, W2K, WinXP Workstations

code:
If Exist "M:" /delete

EndIf
This is total garbage, please see the KiXtart Manual for correct syntax. Correct syntax would be
code:
IF EXIST('M:\nul')
  USE M: /delete /persistent
ENDIF
See also File Operations

Please read the KiXtart Manual and the FAQ Forum.
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