• Dumb Questions

    A car is bogged at Port Parham South Australia in 1951Something I still remember from my school days was one of my teachers telling me, "David, don't be afraid to ask a question!". Presumably I'd been struggling with a particular topic (possibly maths), and essentially they were encouraging me not to sit there "spinning my wheels", but get some help to make sense of the problem.

    That's a lesson that's just as applicable today as it was then. In software development, we are constantly solving problems. Some are easy, and some are hard. Some are easy but the hard bit is finding the bit that will be easy to fix.

    Sometimes it's just the act of getting a colleague to come and have a look that sheds light on the problem.

    But not just in work. Only this week I was at a Church meeting, and people were asking some very deep, insightful questions. I however asked what some might call a "dumb" question (but one which I didn't know the answer, hence why I asked).

    After the meeting as I was leaving, a couple of people came up to me and said, "I was wondering the same thing, thanks for asking that!".

    Which is another great reason to ask questions, even if you think they're dumb, as odds are someone else is wondering the same thing too.

    Photo from Mallala Museum, used under Creative Commons Attribution-NonCommercial 2.0 Generic license

  • What's waking up my computer at 3am?

    I was working late last night, and when I was done, I chose 'Hibernate' when I was closing my laptop. This morning, I went to grab my laptop and noticed it was warm (with the lid down). Something had caused it to wake up, but what?

    First stop, Event Viewer. In the System Log, there's this event:

    The system has returned from a low power state.

    Sleep Time: 2013-10-16T14:59:15.107518600Z Wake Time: 2013-10-16T16:44:40.891642600Z

    Wake Source: Unknown

    Well that's not particularly useful.

    I remember previously having a similar problem caused by a scheduled task – so maybe it would be worth checking what scheduled tasks are active and allowed to wake up the computer? You can view all scheduled tasks by opening the Windows Task Scheduler application. The problem is that tasks are listed hierarchically, so you'd need to drill down into every folder and review each task. Maybe PowerShell can do this more efficiently?

    Graimer posts a good example of querying scheduled tasks on Stack Overflow.

    I've extended it so that I can filter just the tasks with WakeToRun and Enabled both true.

    function getTasks($path) {
        $out = @()
    
        # Get root tasks
        $schedule.GetFolder($path).GetTasks(0) | % {
            $xml = [xml]$_.xml
            $obj = New-Object psobject -Property @{
                "Name" = $_.Name
                "Path" = $_.Path
                "LastRunTime" = $_.LastRunTime
                "NextRunTime" = $_.NextRunTime
                #"WakeToRun" = [bool]::Parse( $xml.Task.Settings.WakeToRun
                #"Enabled" = [bool] $xml.Task.Settings.Enabled
                "Actions" = ($xml.Task.Actions.Exec | % { "$($_.Command) $($_.Arguments)" }) -join "`n"
            }
    
            if ($xml.Task.Settings.WakeToRun)
            {
                Add-Member -InputObject $obj -Name "WakeToRun" -Value ([bool]::Parse( $xml.Task.Settings.WakeToRun )) -MemberType NoteProperty
            }
    
            if ($xml.Task.Settings.Enabled)
            {
                Add-Member -InputObject $obj -Name "Enabled" -Value ([bool]::Parse( $xml.Task.Settings.Enabled )) -MemberType NoteProperty
            }
    
            $out += $obj
        }
    
        # Get tasks from subfolders
        $schedule.GetFolder($path).GetFolders(0) | % {
            $out += getTasks($_.Path)
        }
    
        #Output
        $out
    }
    
    $tasks = @()
    
    $schedule = New-Object -ComObject "Schedule.Service"
    $schedule.Connect()
    
    # Start inventory
    $tasks += getTasks("")
    
    # Close com
    [System.Runtime.Interopservices.Marshal]::ReleaseComObject($schedule) | Out-Null
    Remove-Variable schedule
    
    # Output all tasks
    $tasks | Where-Object { $_.WakeToRun -and $_.Enabled }
    

    (It appears that these extra properties are sometimes null or don't exist, so I had to add them conditionally)

    So, what were the results? There were two:

    Actions     :
    Path        : \Microsoft\Windows\TaskScheduler\Manual Maintenance
    Name        : Manual Maintenance
    LastRunTime : 30/12/1899 12:00:00 AM
    NextRunTime : 30/12/1899 12:00:00 AM
    WakeToRun   : True
    Enabled     : True
    
    Actions     :
    Path        : \Microsoft\Windows\TaskScheduler\Regular Maintenance
    Name        : Regular Maintenance
    LastRunTime : 17/10/2013 8:16:31 AM
    NextRunTime : 18/10/2013 3:00:04 AM
    WakeToRun   : True
    Enabled     : True
    

    I think we can exclude the first, as it has never run. The second looks interesting as the NextRunTime is pretty close to the time that my laptop resumed. I'll change the WakeToRun setting on this task to see if the problem goes away.

  • Windows 8.1 VPN Settings

    In Windows 8 after you had configured a VPN, you could right-click on a VPN connection and a context menu gave you two options:

    • View connection properties
    • Clear cached credentials

    Windows 8 VPN context menu

    The second item is really useful when your password for the VPN has changed, and you need to enter the new password.

    Upgrading to Windows 8.1, this context menu doesn't seem to exist anymore. It seems that to modify connection properties or credentials, the only option is to search for "Change VPN Settings".

    Windows 8.1 VPN Settings

    Selecting a VPN connection then enables Edit and Remove buttons. Clicking Edit takes you to the Connection Properties screen, where you can update credentials and VPN proxy settings.

    Strange that this is a bit harder under 8.1.