How to Fix Diagnostic Data Viewer Not Opening or Crashing on Windows
Windows Diagnostic Data Viewer won't open? DDV crashes on launch? Diagnostic Data Viewer stuck loading? App shows blank screen? Cannot view telemetry data? Fix Diagnostic Data Viewer issues.
Main Troubleshooting Guide
How to Fix Microsoft Store Not Working →Complete symptoms, causes, and step-by-step solutions
Symptoms
You might be experiencing this problem if you notice:
- •Diagnostic Data Viewer fails to launch from Settings
- •App opens briefly then crashes immediately
- •Diagnostic Data Viewer shows blank or empty window
- •Loading spinner never completes in DDV
- •App not found in Microsoft Store for reinstall
- •Toggle in Settings greyed out for Diagnostic Data Viewer
How RescuePC fixes Diagnostic Data Viewer when it refuses to open
Diagnostic Data Viewer relies on the Connected User Experiences and Telemetry service plus the AppX framework. When either is in a partial state — a half-installed AppX package, a stopped DiagTrack service, or a corrupted event subscription — the app launches and immediately closes. RescuePC walks the chain end to end.
- →Restarts and verifies the Connected User Experiences and Telemetry service (DiagTrack)
- →Re-registers Microsoft.DiagnosticDataViewer via Add-AppxPackage manifest reinstall
- →Confirms diagnostic data viewing is enabled in Settings → Privacy → Diagnostics & feedback
- →Repairs the EventLog-Diagnostic channel so historical telemetry is visible
- →Clears the DDV cache directory so a stalled session does not block the next launch
Most useful when Diagnostic Data Viewer flashes open and disappears, when the toggle in Settings does nothing, or when you see "Diagnostic data viewer is unavailable" after a Windows feature update.
Common Causes
- ⚠Diagnostic Data Viewer app corrupted or outdated
- ⚠Diagnostic data collection disabled in Settings
- ⚠AppX package registration broken
- ⚠Insufficient diagnostic data level configured
- ⚠Windows Privacy settings blocking data access
- ⚠Corrupt Microsoft Store cache preventing updates
Solutions
Solution 1: Enable Diagnostic Data and Reset App
- 1Ensure diagnostic data is enabled:
- 2Settings → Privacy & Security → Diagnostics & feedback
- 3Turn on "Send optional diagnostic data"
- 4Enable "View diagnostic data" toggle
- 5If DDV is installed but not working:
- 6Settings → Apps → Installed apps
- 7Find "Diagnostic Data Viewer" → Advanced options
- 8Click Reset, then try launching again
- 9If Reset fails, click Repair first then Reset
Solution 2: Reinstall Diagnostic Data Viewer
- 1Uninstall the current version:
- 2PowerShell as Admin:
- 3Get-AppxPackage *DiagnosticDataViewer* | Remove-AppxPackage
- 4Clear Store cache:
- 5Win+R → wsreset.exe → wait for Store to open
- 6Reinstall from Microsoft Store:
- 7Search "Diagnostic Data Viewer" in Store
- 8Install and launch from Settings → Diagnostics & feedback
Solution 3: Check Group Policy and Registry
- 1Verify policy isnt blocking:
- 2Win+R → gpedit.msc (Pro/Enterprise)
- 3Computer Configuration → Admin Templates → Windows Components → Data Collection
- 4Set "Allow Diagnostic Data" to at least "Optional diagnostic data"
- 5Registry check:
- 6HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Diagnostics\DiagTrack
- 7Ensure "DiagTrackAuthorization" is not set to 0
- 8Restart PC after policy changes
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