removes some registry points for SysAid

Uninstall-SysAidRegistry.ps1

 
# Remove registry entries
    $null = New-PSDrive -Name HKCR -PSProvider Registry -Root HKEY_CLASSES_ROOT

    # Remove registry entries

    $oldRegKeys = `
        'HKLM:\SOFTWARE\Ilient',
        'HKLM:\SOFTWARE\Wow6432Node\Ilient',
        'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{FC5E1D1D-6D3F-4844-A937-567D589F655E}'

    $installedKeys = `
        'HKCR:\Installer',
        'HKLM:\SOFTWARE\Classes\Installer',
        'HKLM:\SOFTWARE\WOW6432Node\Classes\Installer'

    $subKeys = 'Products','Features','UpgradeCodes'

    $targetKeys = @()
    
    ForEach ($subKey in $subKeys){
        ForEach ($installedKey in $installedKeys){
            $targetKeys += ($installedKey + '\' + $subKey)
        }
    }

    # Keep only keys that exist
    $targetKeys = $targetKeys | Where {(Test-Path $_)}

    # Find any registry keys with properties matching the $findFilter ('SysAid')
    $matchingKeys = (
        $targetKeys |
        Get-ChildItem -ErrorAction SilentlyContinue |
        Get-ItemProperty |
        ForEach {If (Find-PropText $_ $findFilter){$_}}
    )

    # Find any package codes listed, we will use these to discover more potential registry points
    $packageCodes = $matchingKeys | Select -ExpandProperty PackageCode | Sort -Unique

    # Search target keys for sub-properties matching any discoveries from $packageCodes
    ForEach ($iCode in $packageCodes){
        $codeResults = (
            $targetKeys |
            Get-ChildItem -ErrorAction SilentlyContinue |
            Get-ItemProperty |
            ForEach {If (Find-PropText $_ ('*' + $iCode + '*')){$_}}
        )
        # If any results, add each individually to the matching keys.
        If ($codeResults){$codeResults | %{$matchingKeys += $_}}
    }

    # If any old keys exist, add them to the results
    ForEach ($oldKey in $oldRegKeys){
        If ((Test-Path $oldKey)){$matchingKeys += (Get-ItemProperty $oldKey)}
    }

    # Clear any duplicate key matches from list, then delete all matches
    $matchingKeys = $matchingKeys | Sort -Unique PSPath

    ForEach ($iMatch in ($matchingKeys.PSPath)){
        Remove-Item $iMatch -Force -Recurse
    }