Try something like this:
 Code:
$Cmd = '%COMSPEC% /c 'REGEDIT /s C:\CHANGES.REG'
'About to run ' $Cmd ?   ; debugging message
Shell $Cmd
Also, is this reg file all HKCU content or does it contain some HKLM? If the latter, a regular user may not have permissions to do this.

Glenn
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Actually I am a Rocket Scientist! \:D