How to Clean Microsoft Outlook SecureTemp Attachments Cache (Content.Outlook)
Location & Quick Verdict
%LocalAppData%\Microsoft\Windows\INetCache\Content.Outlook
Every time you double-click an email attachment in classic Outlook, Windows saves a hidden read-only copy inside Content.Outlook.
How Embedded Chromium (Electron / CEF) Caches Bloated Microsoft Outlook SecureTemp Attachments Cache (Content.Outlook)
Modern web browsers and desktop apps built on Electron, Chromium Embedded Framework (CEF), or WebView2 run a full browser storage engine inside %LocalAppData%\Microsoft\Windows\INetCache\Content.Outlook. Every inline video preview, animated sticker, PWA offline bundle, and compiled V8 JavaScript script is written into disk-backed Cache_Data, Code Cache, Service Worker CacheStorage, and IndexedDB LevelDB tables without strict disk quotas.
Over months of daily usage, Microsoft Outlook SecureTemp Attachments Cache (Content.Outlook) accumulates 1.0 GB – 8.0 GB of expired media blobs and stale Service Worker caches that are never evicted automatically. Clearing these cache subdirectories forces a clean storage state without deleting your saved passwords, active session cookies, bookmarks, or local databases.
# Inspect current disk footprint of Microsoft Outlook SecureTemp Attachments Cache (Content.Outlook) (Read-Only)
$target = "$env:LOCALAPPDATA\Microsoft\Windows\INetCache\Content.Outlook"
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 Close Microsoft Outlook.
- 2 Press Windows Key + R, type %localappdata%\Microsoft\Windows\INetCache\Content.Outlook and press Enter.
- 3 Delete the temporary attachment files inside.
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 Microsoft Outlook SecureTemp Attachments Cache (Content.Outlook)
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 Microsoft Outlook SecureTemp Attachments Cache (Content.Outlook) are safe to purge and which files remain protected:
| Sub-Folder / Cache Location | Storage Role | Typical Footprint | Deletion Safety |
|---|---|---|---|
| %LocalAppData%\Microsoft\Windows\INetCache\Content.Outlook\Cache\Cache_Data | HTTP Disk Cache, Web Bundles & Static Media Chunks | 1.0 GB – 8.0 GB | 🟢 100% Safe |
| %LocalAppData%\Microsoft\Windows\INetCache\Content.Outlook\Service Worker\CacheStorage | Offline PWA Assets, Background Sync & Media Blob Storage | 500 MB – 6.5 GB | 🟢 100% Safe |
| %LocalAppData%\Microsoft\Windows\INetCache\Content.Outlook\Code Cache\js & wasm | V8 Compiled JavaScript & WebAssembly Bytecode Cache | 250 MB – 2.5 GB | 🟢 100% Safe |
| %LocalAppData%\Microsoft\Windows\INetCache\Content.Outlook\GPUCache & DawnCache | Chromium Skia/ANGLE/WebGPU Compiled Shader Cache | 200 MB – 2.0 GB | 🟢 100% Safe |
| %LocalAppData%\Microsoft\Windows\INetCache\Content.Outlook\Crashpad\reports | Historical Process Minidump (.dmp) Telemetry Files | 150 MB – 3.0 GB | 🟢 100% Safe |
| Cookies, Login Data, Bookmarks & Local Storage (leveldb) | Active Account Sessions, Saved Passwords & User Preferences | Protected | 🔒 Protected — Never Touched |
Frequently Asked Questions
Is it safe to delete Microsoft Outlook SecureTemp Attachments Cache (Content.Outlook)?
Yes, 100% safe. Safely removes duplicate opened attachment copies while leaving the original emails and attachments in your inbox untouched.
How much storage space will cleaning Microsoft Outlook SecureTemp Attachments Cache (Content.Outlook) free up?
Users typically reclaim 1.0 GB – 8.0 GB on Windows 10 and Windows 11 systems depending on update frequency and active cache retention in %LocalAppData%\Microsoft\Windows\INetCache\Content.Outlook.
Will clearing Microsoft Outlook SecureTemp Attachments Cache (Content.Outlook) sign me out of my accounts or delete my chat history?
No. Authentication tokens, cookies, and bookmarks live in separate profile files (such as Cookies, Login Data, and Local Storage). Cleaning the cache subfolders inside %LocalAppData%\Microsoft\Windows\INetCache\Content.Outlook only removes temporary media and script caches.
Where is Microsoft Outlook SecureTemp Attachments Cache (Content.Outlook) located on Windows 10 and Windows 11?
It is stored at %LocalAppData%\Microsoft\Windows\INetCache\Content.Outlook. 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 Microsoft Outlook SecureTemp Attachments Cache (Content.Outlook) Automatically
SWEEPR Cleaner safely clears Microsoft Outlook SecureTemp Attachments Cache (Content.Outlook) 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.