Since last about a week, my QuickBooks Desktop Pro 2021 crashes during startup. When I start it, I get the logo, QuickBooks main window comes up with "Reminders" and "Home" window showing. Once everything opens up, just as I am about to do any operation, QuickBooks crashes (before I even do anything).

I repaired mu QuickBooks installation, I removed and reinstalled it again, I verified data, I rebuilt data, I ran QuickBooks Desktop File Doctor, I ran QuickBooks Tool Hub. None of that helped. My windows OS up to date. QuickBooks is up to date.

Only thing that seems to work (sometimes) is, after QuickBooks crashes, if I rename/delete the "<QBW Filename>.qbw.ND" from the company file data directory. Once that file is out of the way, I can start QuickBooks fine..... until I close and restart it again. When I restart it again, QuickBooks starts to crash. I then have to move the ND file out of the way and I can start it one more time.

Many times, I have to reboot after moving the ND file out of the way to get it to start again.

Very (to put it mildly) frustrating.

Windows Event Viewer records several errors:

• An unexpected error has occured in "QuickBooks Desktop Pro 2021":
  Connection Error:Invalid user ID or password
• An unexpected error has occured in "QuickBooks Desktop Pro 2021":
  Connection String:CON=QBConnectionPool-Probe-QB_data_engine_31; ;DBF=<CompanyFilePath>;ENG=QB_data_engine_31;DBN=f0506fecbc884fd8b52b73320542c2b9
• An unexpected error has occured in "QuickBooks Desktop Pro 2021":
  DBConnPool::HandleConnectionError errorCode:-6069, dbCode:-103 from file:'src\connpool.cpp' at line 1043 from function:'DBMgr::DBConnPool::init'
• An unexpected error has occured in "QuickBooks Desktop Pro 2021":
  FeatureDiscovery:NudgeConfig::GetNudgeConfigValue::Can't find nudge config value for key1: FTUDashboard, key2: Version
• An unexpected error has occured in "QuickBooks Desktop Pro 2021":
  FeatureDiscovery:NudgeConfig::GetNudgeConfigValue::Can't find nudge config value for key1: NudgeConfig, key2: DelayedCoFileOpened, key3: DiscoveryHubIconFTU, key4: ShowHighlighter
• An unexpected error has occured in "QuickBooks Desktop Pro 2021":
  FeatureDiscovery:NudgeConfig::GetNudgeConfigValue::Can't find nudge config value for key1: NudgeConfig, key2: DelayedCoFileOpened, key3: ActivateDIYAssistedPayrollNudge, key4: ShowHighlighter
• An unexpected error has occured in "QuickBooks Desktop Pro 2021":
  FeatureDiscovery:NudgeConfig::GetNudgeConfigValue::Can't find nudge config value for key1: NudgeConfig, key2: DelayedCoFileOpened, key3: ActivateAssistedPayrollNudge, key4: ShowHighlighter
• An unexpected error has occured in "QuickBooks Desktop Pro 2021":
  FeatureDiscovery:NudgeConfig::GetNudgeConfigValue::Can't find nudge config value for key1: NudgeConfig, key2: DelayedCoFileOpened, key3: ConnectBankForAssistedPayrollNudge, key4: ShowHighlighter
• An unexpected error has occured in "QuickBooks Desktop Pro 2021":
  FeatureDiscovery:NudgeConfig::GetNudgeConfigValue::Can't find nudge config value for key1: NudgeConfig, key2: DelayedCoFileOpened, key3: SetupAssistedPayrollNudge, key4: ShowHighlighter
• An unexpected error has occured in "QuickBooks Desktop Pro 2021":
  FeatureDiscovery:NudgeConfig::GetNudgeConfigValue::Can't find nudge config value for key1: NudgeConfig, key2: DelayedCoFileOpened, key3: CompleteAssistedPayrollSetupNudge, key4: ShowHighlighter
• An unexpected error has occured in "QuickBooks Desktop Pro 2021":
  FeatureDiscovery:NudgeConfig::GetNudgeConfigValue::Can't find nudge config value for key1: NudgeConfig, key2: DelayedCoFileOpened, key3: AssistedPayrollIsAllSetNudge, key4: ShowHighlighter
• An unexpected error has occured in "QuickBooks Desktop Pro 2021":
  FeatureDiscovery:NudgeConfig::GetNudgeConfigValue::Can't find nudge config value for key1: NudgeConfig, key2: DelayedCoFileOpened, key3: PhoenixSunsetFeatures, key4: ShowHighlighter
• An unexpected error has occured in "QuickBooks Desktop Pro 2021":
  FeatureDiscovery:NudgeConfig::GetNudgeConfigValue::Can't find nudge config value for key1: NudgeConfig, key2: DelayedCoFileOpened, key3: SubscriptionEndingNudge, key4: ShowHighlighter
• An unexpected error has occured in "QuickBooks Desktop Pro 2021":
  FeatureDiscovery:NudgeConfig::GetNudgeConfigValue::Can't find nudge config value for key1: NudgeConfig, key2: DelayedCoFileOpened, key3: CriticalUpgradeNudge, key4: ShowHighlighter
• An unexpected error has occured in "QuickBooks Desktop Pro 2021":
  FeatureDiscovery:NudgeConfig::GetNudgeConfigValue::Can't find nudge config value for key1: NudgeConfig, key2: DelayedCoFileOpened, key3: SubscriptionEndingNudgeWithWallet, key4: ShowHighlighter
• An unexpected error has occured in "QuickBooks Desktop Pro 2021":
  FeatureDiscovery:NudgeConfig::GetNudgeConfigValue::Can't find nudge config value for key1: NudgeConfig, key2: DelayedCoFileOpened, key3: EnhanceGmailSecurity, key4: ShowHighlighter
• Faulting application name: qbw32.exe, version: 31.0.4010.3103, time stamp: 0x628838ff
  Faulting module name: QBUtilities.dll, version: 31.0.4010.0, time stamp: 0x628846c3
  Exception code: 0xc0000005
  Fault offset: 0x000467a1
  Faulting process id: 0x2968
  Faulting application start time: 0x01d8836dfcd11e60
  Faulting application path: C:\Program Files (x86)\Intuit\QuickBooks 2021\qbw32.exe
  Faulting module path: C:\Program Files (x86)\Intuit\QuickBooks 2021\QBUtilities.dll
  Report Id: e5e035b5-4ad7-44dd-84f9-20fdb57a9287
  Faulting package full name:
  Faulting package-relative application ID:

• Application: CefSharp.BrowserSubprocess.exe
  Framework Version: v4.0.30319
  Description: The process was terminated due to an unhandled exception.
  Exception Info: System.ServiceModel.CommunicationObjectFaultedException

  Server stack trace:
  at System.ServiceModel.Channels.CommunicationObject.ThrowIfDisposedOrNotOpen()
  at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
  at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
  at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)
  at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(System.Runtime.Remoting.Messaging.IMessage, System.Runtime.Remoting.Messaging.IMessage)
  at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(System.Runtime.Remoting.Proxies.MessageData ByRef, Int32)
  at CefSharp.Internals.IBrowserProcess.GetProperty(Int64, System.String)
  at CefSharp.JavascriptObjectWrapper.GetProperty(System.String)
  at <Module>.CefSharp.JavascriptPropertyHandler.Get(CefSharp.JavascriptPropertyHandler*, CefStringBase<CefStringTraitsUTF16>*, scoped_refptr<CefV8Value>*, scoped_refptr<CefV8Value>*, CefStringBase<CefStringTraitsUTF16>*)
  at <Module>.CefExecuteProcess(CefMainArgs*, scoped_refptr<CefApp>*, Void*)
  at CefSharp.BrowserSubprocess.SubProcess.Run()
  at CefSharp.BrowserSubprocess.BrowserSubprocessExecutable.Main(System.Collections.Generic.IEnumerable`1<System.String>, CefSharp.RenderProcess.IRenderProcessHandler)
  at CefSharp.BrowserSubprocess.Program.Main(System.String[]

• Faulting application name: CefSharp.BrowserSubprocess.exe, version: 84.4.10.0, time stamp: 0x5f45f0d1
  Faulting module name: KERNELBASE.dll, version: 10.0.[removed], time stamp: 0x270baf18
  Exception code: 0xe0434352
  Fault offset: 0x0012c3a2
  Faulting process id: 0x4750
  Faulting application start time: 0x01d8836e138afc54
  Faulting application path: C:\Program Files (x86)\Intuit\QuickBooks 2021\CefSharp.BrowserSubprocess.exe
  Faulting module path: C:\WINDOWS\System32\KERNELBASE.dll
  Report Id: 685fc657-9ad7-4d70-92b5-1168d02ad582
  Faulting package full name:
  Faulting package-relative application ID: