# When deleting temp files en masse, only delete files/folders older than the number of days specified here
$OlderThan = 7
$TimeDelta = New-TimeSpan -Days $OlderThan

# Only run this section if we have administrative privileges
If ( IsAdmin )
{
    LogMsg "Running with administrative privileges"

    # Remove all *.evtx files from $SysTemp
    $EventLogs = Get-ChildItem -Path "${Env:SystemRoot}\TEMP\*" -File -Filter *.evtx
    If ( $EventLogs )
    {
        LogMsg "Deleting all event logs from ${Env:SystemRoot}\TEMP"
        ForEach ( $EventLog in $EventLogs ) { Remove-Item $EventLog -Force -ErrorAction SilentlyContinue }
    }

    # Remove misc logs and error reports
    $MiscLogs = Get-ChildItem -Path "${Env:SystemRoot}\TEMP\*" -File -Include "${Env:COMPUTERNAME}-*.log", "AppxErrorReport_*.txt"
    If ( $MiscLogs )
    {
        LogMsg "Deleting misc logs from ${Env:SystemRoot}\TEMP"
        ForEach ( $MiscLog in $MiscLogs ) { Remove-Item $MiscLog -Force -ErrorAction SilentlyContinue }
    }
    
    # Remove archived CBS logs
    $CBSLogs = Get-ChildItem -Path "${Env:SystemRoot}\Logs\CBS\*" -File -Include "CbsPersist_*.log", "CbsPersist_*.cab"
    If ( $CBSLogs )
    {
        $TotalBytes = 0
        ForEach ( $CBSLog in $CBSLogs) { $TotalBytes += $CBSLog.Length }
        $TotalSize = $TotalBytes / 1MB
        If ( $TotalSize -ge 200 ) {
            LogMsg "Total CBS log archive size: ${TotalSize}MB"
            Control-Service -Stop 'TrustedInstaller'
            LogMsg "Deleting primary CBS.log file"
            Remove-Item "${Env:SystemRoot}\Logs\CBS\CBS.log" -Force -ErrorAction SilentlyContinue }
            Control-Service -Start 'TrustedInstaller'
        }
        LogMsg "Deleting archived CBS logs from ${Env:SystemRoot}\Logs\CBS"
        ForEach ( $CBSLog in $CBSLogs ) { Remove-Item $CBSLog -Force -ErrorAction SilentlyContinue }
        
    }

    # Remove all system temp files older than 7 days
    $OldTempFiles = Get-ChildItem -Path "${Env:SystemRoot}\TEMP" | Where { $_.LastWriteTime -lt ((Get-Date) - $TimeDelta) }
    If ( $OldTempFiles )
    {
        LogMsg "Deleting all temp files not modified in ${OlderThan} day(s) from ${Env:SystemRoot}\TEMP"
        ForEach ( $OldTempFile in $OldTempFiles ) { Remove-Item $OldTempFile -Force -Recurse -ErrorAction SilentlyContinue }
    }

    # Turn off system hibernation if it's in use
    If ( Test-Path "${Env:SystemDrive}\hiberfil.sys" )
    {
        LogMsg "Turning off system hibernation"
        Try { Start-Process "powercfg" -ArgumentList "-h off" -Wait }
        Catch { LogErr $_.Exception.Message }
    }

    # Remove PDCRevocation dump files
    $PDCRevocationDumpFiles = Get-ChildItem -Path "${Env:SystemRoot}\LiveKernelReports\*" -File -Include "PDCRevocation-*.dmp"
    If ( $PDCRevocationDumpFiles ) {
        LogMsg "Deleting PDCRevocation dump files from ${Env:SystemRoot}\LiveKernelReports"
        ForEach ( $PDCRevocationDump in $PDCRevocationDumpFiles ) { Remove-Item $PDCRevocationDump -Force -ErrorAction SilentlyContinue }
    }

    # Remove Genetec application crash dumps
    If ( Test-Path "${Env:ProgramData}\Genetec\Dumps" ) {
        $GenetecCrashDumps = Get-ChildItem -Path "${Env:ProgramData}\Genetec\Dumps"
        If ( $GenetecCrashDumps )
        {
            LogMsg "Deleting Genetec application crash dumps"
            Try { ForEach ( $dump in $GenetecCrashDumps ) { Remove-Item $dump.FullName -Force -Recurse -ErrorAction SilentlyContinue } }
            Catch { LogErr $_.Exception.Message }
        }
    }

    # Remove AutoCAD temp files
    If (-not (IsRunning -Name "acad") ) {
        $AutoCADTempFiles = Get-ChildItem -Path "${Env:SystemDrive}\Users" | Where-Object { $_.PSIsContainer -eq $true } | ForEach-Object { Get-ChildItem -Path $($_.FullName + "\AppData\Local\Temp\*") -File -Include '*.ac$' -ErrorAction SilentlyContinue }
        If ( $AutoCADTempFiles ) {
            LogMsg "Deleting AutoCAD temp files for all users"
            ForEach ( $tempfile in $AutoCADTempFiles ) { Remove-Item $tempfile -Force -ErrorAction SilentlyContinue }
        }
    }

    # Silently run cleanmgr.exe with default settings
    LogMsg "Running cleanmgr.exe with default settings"
    Try { Start-Process "cleanmgr.exe" -ArgumentList "/VERYLOWDISK" }
    Catch { LogErr $_.Exception.Message }
}

# Only run this section if we don't have administrative privileges
Else
{
    LogMsg "Running without administrative privileges"

    # Remove all system temp files older than 7 days
    $OldTempFiles = Get-ChildItem -Path $Env:TEMP | Where { $_.LastWriteTime -lt ((Get-Date) - $TimeDelta) }
    If ( $OldTempFiles )
    {
        LogMsg "Deleting all temp files not modified in ${OlderThan} day(s) from ${Env:TEMP}"
        ForEach ( $OldTempFile in $OldTempFiles ) { Remove-Item $OldTempFile -Force -Recurse -ErrorAction SilentlyContinue }
    }

    # Remove AutoCAD temp files
    If (-not (IsRunning -Name "acad") ) {
        $AutoCADTempFiles = Get-ChildItem -Path "${Env:TEMP}\*" -File -Include '*.ac$' -ErrorAction SilentlyContinue
        If ( $AutoCADTempFiles ) {
            LogMsg "Deleting AutoCAD temp files"
            ForEach ( $tempfile in $AutoCADTempFiles ) { Remove-Item $tempfile -Force -ErrorAction SilentlyContinue }
        }
    }

    # Silently run cleanmgr.exe with default settings
    LogMsg "Running cleanmgr.exe with default settings"
    Try { Start-Process "cleanmgr.exe" -ArgumentList "/VERYLOWDISK" }
    Catch { LogErr $_.Exception.Message }
}