Powershell v3 unzip

unzip.ps1

function Expand-ZIPFile($file, $destination) {
	$shell = new-object -com shell.application
	$zip = $shell.NameSpace($file)
	foreach($item in $zip.items())
		{
			$shell.Namespace($destination).copyhere($item)
		}
}

Expand-ZIPFile –File testfile.zip –Destination c:\temp

Powershell v5 -

Get-Command *archive | ft CommandTYpe, Name -a

CommandType Name
———– —-
Function Compress-Archive
Function Expand-Archive

To compress

$files = Get-ChildItem -Path C:\Scripts -Filter *.csv | select -ExpandProperty Fullname
Compress-Archive -Path $files -DestinationPath C:\Scripts\t1.zip -CompressionLevel Optimal

or a single file

Compress-Archive -Path c:\scripts\test.csv -DestinationPath C:\Scripts\t2.zip -CompressionLevel Optimal

To uncompress

Expand-Archive -Path C:\Scripts\t1.zip -DestinationPath c:\scripts

if you need to overwrite files:

Expand-Archive -Path C:\Scripts\t1.zip -DestinationPath c:\scripts -Force