Visual Studio Update 4 crashes after startup screen - visual-studio-2013

When I open "Visual Studio 2013 Update 4", it will show the following message
An exception was thrown by a TaskScheduler.
I have searched the internet for solutions, but all proposed solutions suggest /safemode or repair. I have tried both ways and they both didn't work out.
I am pretty frustrated right now. Can you please provide a solution.

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Is there a solution for this?
UPDATE
When Visual Studio crashes I get this error: https://i.imgur.com/VtaikJ5.png?1
My ActivityLog.xml is on OneDrive: https://onedrive.live.com/redir?resid=B3519F287A9CD3FC!2830&authkey=!AIUDHo1bCZan4Fk&ithint=file%2cxml
I already received the answer from the MSDN forum. And it was caused by the Web Essentials extension tool. And apparently with the Visual Studio Update 4 everything seems to be fixed. The extension tool was causing the error, and that error is fixed in the update.
Thanks for the support everyone!

Visual Studio 2013 crashes with an exception - An exception was thrown by a taskscheduler

Visual Studio 2013 is crashing with an exception - An exception was thrown by a taskscheduler.
I am unable to resolve this issue, searched but could not get any useful information on this.
Need help to resolve it.
many time when we update our .NET Framework then this problem is occurred. Check if you update your version of .NET Framework then uninstall that and also repair visual studio.
I could not even uninstall/repair the Visual Studio. When i clicked on the Visual Studio from the Control Panel, even the uninstall wizard did not come up.
The solution which worked for me is:
When I saw the GAC_MSIL, many dll's were missing, then i copied System.dll, System.Core.dll and System.Reflection.dll into the GAC_MSIL. After copying these dll's , from the control panel the uninstall wizard started, and then i repaired the VS 2013. Then it worked.
I also saw this sort of crash in one of my VMs, in that scenario, i copied the above dll's and VS started working.

Visual studio 2010 unable to debug web application. Maybe corrupt installation?

I can't debug my Sharepoint 2010 project. Visual Studio 2010 shows me the following error message:
Unable to attach to he process. An error occurred that usually indicates a corrupt installation (code 0x80040154). If the problem persists, repair your Visual Studio installation via 'Add or Remove Programs' in Control Panel.
I experienced this problem some days ago for the first time.
At first repairing helped, but after a little time the error occurred again.
I have tried restarting computer, too, after which the problem was gone for only a little time.
I have uninstalled/reinstalled visual studio, but still no success.
How can I solve this problem, I have no idea about the reason.
EDIT: I have noticed that the problem occurs only when I try to debug a workflow code.
I have had this issue in the past and solved it by ensuring I'm compiling the code to x64. Check your settings in Visual Studio. SharePoint is 64bit only.
Good Luck.
I had a problem with the javascript debugger on a web project, and I got a similar error message. The fix was: Closed all instances of Visual Studio. I threw away the app in inetmgr, and re-opened visual studio with my solution that has my web app. It re-created the virtual directory on opening. Javascript debugger started working again.

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