Hi Bill
No, nothing else; I just de-installed Citrix Workspace, and other app I had which named Citrix plug-in I think. Reboot after that, and I checked that in device manager none virtual device from Citrix stilled there. Prior to this, I installed the Intel drivers instead of Windows or OEM drivers for my video card, I don’t know if this impacted or not. But for sure Citrix WS did the trick.
Regards
Hi All,
Just adding that I have exactly the problem described above since recent updates, first noticed last Friday 27th Jan. I have exactly the same event log as above, i.e.
Faulting module name: ntdll.dll
Exception code: 0xc0000005
Fault offset: 0x0000000000063526
I’ll have a look at Citrix etc tonight but already tried reinstalls, windows/driver updates, etc.
Still doesn’t work after citrix uninstall. Can’t run zwift at all. Fortunately it looks like a Wahoo X trial works on the same machine 
Same problem for me. Running Windows 10, updated to 1.1.5 Zwift and the launcher just shuts down. Done full uninstall, deleted Program Files folder, deleted user zwift folder, rebooted, installed, still nothing.
Just found this in Windows Event Viewer:
Application: ZwiftLauncher.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.Management.ManagementException
at System.Management.ManagementException.ThrowWithExtendedInfo(System.Management.ManagementStatus)
at System.Management.ManagementObjectCollection+ManagementObjectEnumerator.MoveNext()
at ZwiftLauncher.ZwiftNetwork.CollectSystemInfo()
at ZwiftLauncher.MainWindow…ctor(Boolean)
at ZwiftLauncher.App.OnStartup(System.Windows.StartupEventArgs)
at System.Windows.Application.<.ctor>b__1_0(System.Object)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)
at System.Windows.Threading.DispatcherOperation.InvokeImpl()
at MS.Internal.CulturePreservingExecutionContext.CallbackWrapper(System.Object)
at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
at MS.Internal.CulturePreservingExecutionContext.Run(MS.Internal.CulturePreservingExecutionContext, System.Threading.ContextCallback, System.Object)
at System.Windows.Threading.DispatcherOperation.Invoke()
at System.Windows.Threading.Dispatcher.ProcessQueue()
at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
at MS.Win32.HwndWrapper.WndProc(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(System.Object)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)
at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority, System.TimeSpan, System.Delegate, System.Object, Int32)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr, Int32, IntPtr, IntPtr)
at MS.Win32.UnsafeNativeMethods.DispatchMessage(System.Windows.Interop.MSG ByRef)
at System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame)
at System.Windows.Application.RunDispatcher(System.Object)
at System.Windows.Application.RunInternal(System.Windows.Window)
at ZwiftLauncher.App.Main()
And here’s a WMI error that may be related:
Event filter with query “//./root/cimv2” could not be reactivated in namespace “SELECT * FROM __InstanceOperationEvent WITHIN 10 WHERE (TargetInstance ISA ‘Win32_Volume’ AND TargetInstance.DriveType = 2)” because of error 0x80041010. Events cannot be delivered through this filter until the problem is corrected.
Just to add some information to this.
I was running Citrix Workspace on my machine for some time before installing Zwift. I had been using Zwift for ~2 years without issue, until recently.
Not sure if it was caused from Zwift update, as my timeline of app updates etc is not clear, but there were no changes to Citrix Workspace.
Windows did an update for March 2023, but again, not sure if it was that or Zwift updates/changes that caused it to stop working.