How to Clean Windows Diagnostic Data & Telemetry ETL Log Queue
Location & Quick Verdict
C:\ProgramData\Microsoft\Diagnosis\ETLLogs
The Connected User Experiences and Telemetry service collects system performance traces (.etl files) before uploading them to Microsoft servers.
Why Kernel Minidumps, WER Archives & ETW Traces Fill Windows Diagnostic Data & Telemetry ETL Log Queue
Whenever a hardware driver times out (TDR), a background service faults, or Windows Servicing installs a patch, the Windows Error Reporting (WER) pipeline and kernel crash handler write uncompressed memory snapshots (.dmp) and verbose text logs into C:\ProgramData\Microsoft\Diagnosis\ETLLogs. A single full or kernel memory dump or LiveKernelReports WATCHDOG snapshot can consume 500 MB to 4 GB of disk space immediately.
Unless you are actively debugging a recurring Blue Screen of Death (BSOD) with WinDbg right now, historical crash dumps and rotated CBS/DISM log archives inside C:\ProgramData\Microsoft\Diagnosis\ETLLogs serve zero runtime purpose. Deleting Windows Diagnostic Data & Telemetry ETL Log Queue safely reclaims 1.0 GB – 7.0 GB without affecting Windows stability or future error reporting.
# Inspect current disk footprint of Windows Diagnostic Data & Telemetry ETL Log Queue (Read-Only)
$target = "C:\ProgramData\Microsoft\Diagnosis\ETLLogs"
Get-ChildItem -Path $target -Recurse -Force -ErrorAction SilentlyContinue |
Measure-Object -Property Length -Sum |
Select-Object Count, @{Name="SizeGB";Expression={[math]::Round($_.Sum / 1GB, 2)}}
Manual Cleaning Instructions
- 1 Open Terminal as Administrator and run: net stop DiagTrack
- 2 Open C:\ProgramData\Microsoft\Diagnosis\ETLLogs and delete old AutoLogger and ETL files.
- 3 Restart the service with: net start DiagTrack
Note: If Windows alerts that a file is in use or locked by a background process, close the associated task in Task Manager before deleting, or use SWEEPR Cleaner to release locked handles safely.
Sub-Folders & Cache Locations Breakdown for Windows Diagnostic Data & Telemetry ETL Log Queue
Modern Windows applications and system services split their disk footprint across multiple sub-directories (`Cache_Data`, `Service Worker\CacheStorage`, `Code Cache`, `GPUCache`, and `Crashpad\reports`). Review which sub-folders inside Windows Diagnostic Data & Telemetry ETL Log Queue are safe to purge and which files remain protected:
| Sub-Folder / Cache Location | Storage Role | Typical Footprint | Deletion Safety |
|---|---|---|---|
| C:\ProgramData\Microsoft\Diagnosis\ETLLogs (*.dmp / *.hdmp / *.mdmp) | Uncompressed Kernel & User-Mode Memory Crash Dumps | 1.0 GB – 7.0 GB | 🟢 100% Safe |
| C:\ProgramData\Microsoft\Windows\WER\ReportArchive | Queued & Archived Windows Error Reporting Bundles | 300 MB – 4.0 GB | 🟢 100% Safe |
| C:\Windows\Logs\CBS & DISM | Rotated Servicing & Component Store Text Logs | 250 MB – 3.5 GB | 🟢 100% Safe |
| Active Windows Drivers & Event Viewer Channels | Live System Services & Security Audit Configuration | Protected | 🔒 Protected — Never Touched |
Frequently Asked Questions
Is it safe to delete Windows Diagnostic Data & Telemetry ETL Log Queue?
Yes, 100% safe. Deleting queued ETL files frees gigabytes of SSD space immediately and improves privacy without affecting Windows updates.
How much storage space will cleaning Windows Diagnostic Data & Telemetry ETL Log Queue free up?
Users typically reclaim 1.0 GB – 7.0 GB on Windows 10 and Windows 11 systems depending on update frequency and active cache retention in C:\ProgramData\Microsoft\Diagnosis\ETLLogs.
Does Windows need the files in Windows Diagnostic Data & Telemetry ETL Log Queue to boot or run properly?
No. Files inside C:\ProgramData\Microsoft\Diagnosis\ETLLogs are strictly post-mortem diagnostic snapshots and historical logs written for troubleshooting. Windows never reads them during normal startup or runtime operation.
Where is Windows Diagnostic Data & Telemetry ETL Log Queue located on Windows 10 and Windows 11?
It is stored at C:\ProgramData\Microsoft\Diagnosis\ETLLogs. You can paste that path directly into the Windows Run dialog (Win + R) or File Explorer address bar to inspect it.
Manual File Explorer vs. 1-Click SWEEPR Cleanup
| Feature | Manual Deletion | SWEEPR Cleaner |
|---|---|---|
| Locked File Handling | Fails on locked processes | Safe background release |
| Accidental Deletion Risk | Moderate (easy to delete wrong folder) | Zero (strict rules & hashes) |
| Safety Undo Rollback | None (Shift+Del is permanent) | 7-Day Automatic Rollback |
| Time Required | 10–20 minutes per app | < 60 seconds across 40+ areas |
Related Windows Cleanup Guides & Hidden Space Hogs
Clean Windows Diagnostic Data & Telemetry ETL Log Queue Automatically
SWEEPR Cleaner safely clears Windows Diagnostic Data & Telemetry ETL Log Queue along with 40+ other hidden app folders and leftover files in one click—covering up to 5 devices (Windows, Mac, Android & iOS) with a 7-day undo safety net.