Powershell command Enable-ComputerRestore not accepting variable - powershell

Question

Can someone help me with this powershell script?
I can't get it to work.
$drives = Get-WmiObject -class win32_logicaldisk |
Where-Object { $_.DriveType -eq 3 }
$drives | ForEach-Object { Enable-ComputerRestore $_.Name }
Moreover the following works like expected!
$drives = Get-WmiObject -class win32_logicaldisk |
Where-Object { $_.DriveType -eq 3 }
$drives | ForEach-Object { Write-Host $_.Name }
Thanks in advance.

Answer 1

Enable-ComputerRestore seems to have two unusual requirements:
The (positionally implied) -Drive argument(s) must end in \ (backslash), e.g, C:\
In order to target a drive other than the system drive, the system drive must also be specified, alongside the non-system drive or System Restore must already be turned on for the system drive.
Since your code enumerates all local disks (.DriveType -eq 3), the system drive is by definition among them, so the simplest solution is to pass all local drives at once to Enable-ComputerRestore, as an array:
$driveSpecs =
Get-CimInstance -Class Win32_LogicalDisk |
Where-Object { $_.DriveType -eq 3 } |
ForEach-Object { $_.Name + '\' }
Enable-ComputerRestore $driveSpecs
As an aside:
I've replaced Get-WmiObject with Get-CimInstance, because the CIM cmdlets superseded the WMI cmdlets in PowerShell v3 (released in September 2012). Therefore, the WMI cmdlets should be avoided, not least because PowerShell Core (version 6 and above), where all future effort will go, doesn't even have them anymore. For more information, see this answer.
A more concise and more efficient way to filter the Get-CimInstance output is to use a -Filter argument in lieu of a separate Where-Object call:
Get-CimInstance -Class Win32_LogicalDisk -Filter 'DriveType = 3'

Answer 2

Found the solution by my self. Posting for others.
$OSDriveLetter = (Get-ComputerInfo | Select-Object -Property "OsSystemDrive").OsSystemDrive
Get-CimInstance -class win32_logicaldisk |
Where-Object { $_.DriveType -eq 3 } |
ForEach-Object { Enable-ComputerRestore "$($_.Name + '\')", "$($OSDriveLetter + '\')" }