Camtasia stops working windows 7 + .Net 4.7, and how to solve the problem


Camtasia (TechSmith) 8.6 stop working on my Windows 7 and can not edit mp3 file on Windows 10. The problem on Windows 7 was caused by .Net 4.7 update. I have my solution for Windows 7 + Camtasia 8.6.

Problem details

I realized that Camtasia 8.6.0 stops working at 2017-6-14, after a Windows update on my Windows 7 machine. I see the following window when I started Camtasia.

I have a problem with Camtasia 8.6.0 on Windows 10, that mp3 file are frequently truncated. I like the software, especially I like the caption editing capability and figure overlay for educational video editing. I usually try to use some free software, but this one is exceptionally good, so I bought the software a a few years ago. But I don't need the animation and transitions. So I didn't update the software to 9.x.

But this time, I cannot start Camtasia on Windows 7. I have a mp3 editing problem on Windows 10. So, I just tried the free trial version. However, on Windows 7, the installer even doesn't start.

Camtasia 8.6.0 crashes when start up 

On Windows 10, the mp3 truncated problem seems solved. But if it doesn't work on Windows 7, I have no motivation to upgrade it.

I checked Windows event log, then, I found the following error.

Log Name:      Application
Source:        .NET Runtime
Date:          6/14/2017 22:04:10
Event ID:      1026
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      hyamauchi-PC
Application: CamtasiaStudio.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.Runtime.InteropServices.COMException
   at MS.Win32.Penimc.UnsafeNativeMethods.CoCreateInstance(System.Guid ByRef, System.Object, Int32, System.Guid ByRef)
   at MS.Win32.Penimc.UnsafeNativeMethods.CreatePimcManager()
   at MS.Win32.Penimc.UnsafeNativeMethods..cctor()
Exception Info: System.TypeInitializationException
   at MS.Win32.Penimc.UnsafeNativeMethods.CreateResetEvent(IntPtr ByRef)
   at System.Windows.Input.PenThreadWorker..ctor()
   at System.Windows.Input.PenThreadPool.GetPenThreadForPenContextHelper(System.Windows.Input.PenContext)
   at System.Windows.Input.PenThreadPool.GetPenThreadForPenContext(System.Windows.Input.PenContext)
   at System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTabletsImpl()
   at System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTablets()
   at System.Windows.Input.StylusWisp.WispTabletDeviceCollection..ctor()
   at System.Windows.Input.StylusWisp.WispLogic.get_WispTabletDevices()
   at System.Windows.Input.StylusWisp.WispLogic.RegisterHwndForInput(System.Windows.Input.InputManager, System.Windows.PresentationSource)
   at System.Windows.Interop.HwndStylusInputProvider..ctor(System.Windows.Interop.HwndSource)
   at System.Windows.Interop.HwndSource.Initialize(System.Windows.Interop.HwndSourceParameters)
   at <Module>.WPFTimeline.initHwndSource(WPFTimeline*)
   at <Module>.WPFTimeline.initManagedObjects(WPFTimeline*)
   at <Module>.WPFTimeline.InitTimeline(WPFTimeline*, InitTimelineArgs*)
   at <Module>._wWinMainCRTStartup()

From this, I suspect .Net problem, I checked recent my software and windows update, and found I have .Net update.


I remove the .Net 4.7 from the Uninstall Program. Then I install the Camtasia 9 free trial version. But I think re-install 8.6 might work, too. Camtasia 9 free trial version first installs the .Net 4.6, which works fine. When the Windows update asked to update .Net, do not update 4.7, but you can get security update for .Net 4.6.


After all this problem, I decided to update my Camtasia to version 9. Let's see I like the 9.x or not...


Problem: I cannot connect to gmail via Thunderbird with 2 step verification.

Problem: When I try to connect to google mail via Thunderbird, Enter credential for my_email_account  dialog shows up,  but I cannot push the `Next' button. Well, I can push it, but nothing happens.

It seems the authentication method "OAuth2" related with this problem.

Solution: Authenticate with "Normal password", using the google  app password, not use the google account password, and watch the connection activity to check the any suspicious activities.

But I feel this is not good and check further....


Wireless network keeps disconnecting problem

I encounter a Wireless network keeps disconnecting problem (often, frequently disconnection). My laptop is a DELL Precision 5510 with Windows 10, and my router is an O2 router (O2 box 6431).

  • Problem: When I use DELL Precision 5510 with Wifi with O2 router (O2 box 6431). Restart the router only solve the problem temporary.
  • My solution: It seems 802.11n of DELL Precision 5510 has a problem with my router. I am not sure the problem is which side (notebook or router). But these two stop communicate after a while. The router can still connect to Mac book and Fairphone, but the DELL notebook cannot connect to the router.
  • Detailed steps