Output format has brackets

Question

Hi Folks,
After having looks through the forums for an answer on my query and observing the level of complexity in some of the discussions I'm almost too embarrassed to ask this. 
I am writing a script to use as a Detection Method in Config Mgr 2012. It will detect if the Win7 SP1 installation has completed.
$SP1 = "6.1.7601"
$SPInstalled = Get-WmiObject win32_operatingsystem | select version
IF (Compare-Object $SPInstalled $SP1)
Write-Host $SP1 "and" $SPInstalled "are different"
ELSE
Write-Host $SP1 " and " $SPInstalled " are equal"
This will return 6.1.7601 and @{version=6.1.7601} are different
I am a long time vbScripter so I know its possible to manipulate the output of the WMI query with Regular Expressions and remove the unwanted text
@{version= }
However, I have no doubt there is a built in Powershell function that would return just the value of the Version attribute. What's the best way to do this?
Thanks,
Mic

Answer 1

You can use expand property - 
$SP1 = "6.1.7601"
$SPInstalled = Get-WmiObject win32_operatingsystem | select -ExpandProperty version
IF (Compare-Object $SPInstalled $SP1)
Write-Host $SP1 "and" $SPInstalled "are different"
ELSE
Write-Host $SP1 " and " $SPInstalled " are equal"
Or just grab the version value
$SP1 = "6.1.7601"
$SPInstalled = Get-WmiObject win32_operatingsystem | select version
IF (Compare-Object $SPInstalled $SP1)
Write-Host $SP1 "and" $SPInstalled.version "are different"
ELSE
Write-Host $SP1 " and " $SPInstalled.version " are equal"