This PowerShell script performs diagnostic checks related to Windows registry...

June 30, 2025 at 12:16 AM

 $isBroken = 0

                    # Define the root registry path
                    $ShellRegRoot = 'HKCU:\Software\Classes\Local Settings\Software\Microsoft\Windows\Shell'
                    $bagMRURoot =  $ShellRegRoot + '\BagMRU'
                    $bagRoot = $ShellRegRoot + '\Bags'

                    # Define the target GUID tail for MSGraphHome
                    $HomeFolderGuid = '14001F400E3174F8B7B6DC47BC84B9E6B38F59030000'

                    $properties = Get-ItemProperty -Path $bagMRURoot

                    foreach ($property in $properties.PSObject.Properties) {
                        if ($property.TypeNameOfValue -eq 'System.Byte[]') {
                            $hexString = ($property.Value | ForEach-Object { $_.ToString('X2') }) -join ''
                            if ($hexString -eq $HomeFolderGuid) {
                                $subkey = $property.Name
                                $nodeSlot = Get-ItemPropertyValue -Path ($bagMRURoot + '\' + $subkey) -Name 'NodeSlot'
                                $isBroken = if ((Get-ItemPropertyValue -Path ($bagRoot + '\' + $nodeSlot + '\Shell\*') -Name 'GroupView') -eq 0) { 1 } else { 0 }
                                break
                            }
                        }
                    }

                    Write-Host 'Final result:',$isBroken

This PowerShell script performs diagnostic checks related to Windows registry settings associated with the File Explorer "Group View" option. Here's what the code does step-by-step:

Initialize a variable:
The $isBroken variable is initialized to 0. This variable will track whether a certain registry condition is "broken" (set to 1) or not (remains 0).
Define registry paths:
- $ShellRegRoot: This points to the root registry path for user's shell settings (HKCU:\Software\Classes\Local Settings\Software\Microsoft\Windows\Shell).
- $bagMRURoot: Forms the subpath to the registry keys under BagMRU.
- $bagRoot: Forms the subpath to the registry keys under Bags.
Define a target GUID for "MSGraphHome":
$HomeFolderGuid represents a specific GUID related to "MSGraphHome." This acts as the identifier of a target folder or specific behavior.
Retrieve registry properties:
The Get-ItemProperty cmdlet is used to retrieve the properties for the $bagMRURoot. This returns all properties defined under the BagMRU registry key.
Iterate through registry properties:
A foreach loop examines each property in the $properties.PSObject.Properties collection:
- If a property's value is of type System.Byte[] (indicating a binary value in the registry), its value is converted to a hexadecimal string ($hexString).
- The $hexString is compared to $HomeFolderGuid. If they match, this indicates the specific folder being analyzed.
Retrieve and analyze NodeSlot information:
If there's a match with $HomeFolderGuid:
- The script retrieves the NodeSlot value from the specific BagMRU subkey corresponding to the matching registry entry.
- Using NodeSlot, it evaluates the GroupView property from the relevant Bag subkey.
Check the GroupView value:
The registry key's GroupView value is checked:
- If GroupView equals 0, $isBroken is set to 1. This indicates the "broken" condition.
- Otherwise, $isBroken remains 0.
Output the result:
The final value of $isBroken is displayed on the console with a Write-Host statement.

Summary:

The script identifies whether the GroupView registry setting for a specific folder (associated with the target GUID) is misconfigured ("broken"). If the setting is misconfigured (when GroupView is 0), the script sets $isBroken to 1. Otherwise, it indicates no issues (0). The result is printed to the console.

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