#kill open files in powershell
$sessn = New-CIMSession -Computername $computer
Get-SMBOpenFile -CIMSession $sessn |select ClientUserName,Locks,Path,SessionID,FileID | Out-GridView -PassThru –title "Select Open Files"|Close-SmbOpenFile -CIMSession $sessn -Confirm:$true -Verbose


#example for file type
#Get-SMBOpenFile -CIMSession $sessn |Where-Object {$_.Path -Like "*.msg*""} |select ClientUserName,Locks,Path,SessionID,FileID | Out-GridView -PassThru –title "Select Open Files"|Close-SmbOpenFile -CIMSession $sessn -Confirm:$true -Verbose
#Where-Object {$_.Path -Like “*.msg*”}