What is canon-sync.exe?
canon-sync.exe is the Canon Cloud Sync Utility that runs in the background to keep designated folders synchronized between your PC and Canon's cloud services. It monitors folders you select for changes, then coordinates uploads and downloads to ensure your files and metadata stay current across devices.
canon-sync uses a background service and a local cache to detect changes and coordinate REST API calls with Canon Cloud. It authenticates via OAuth, handles delta updates, and resolves simple conflicts while preserving file attributes.
Quick Fact: Canon Cloud Sync supports selective sync so you can choose which folders to keep in sync across devices.
Types of Canon Sync Processes
- Sync Engine: Orchestrates all sync tasks between local folders and Canon Cloud
- Watcher: Monitors filesystem changes in designated sync folders
- Uploader: Uploads new or changed files to Canon Cloud
- Downloader: Pulls updates from Canon Cloud to local folders
- Cache/Index: Maintains local cache and metadata for fast comparisons
- Conflict Resolver: Handles conflicts when the same file changes in multiple places
Is canon-sync.exe Safe?
Yes, canon-sync.exe is safe when it's the legitimate file from Canon downloaded from official sources (canon.com or Canon support).
Is canon-sync.exe a Virus or Malware?
The real canon-sync.exe is NOT a virus. However, malware can imitate legitimate names; verify the file location and signature to be sure.
How to Tell if canon-sync.exe is Legitimate or Malware
- File Location:: Must be in
C:\Program Files\Canon\CanonCloudSync\canon-sync.exe or C:\Program Files (x86)\Canon\CanonCloudSync\canon-sync.exe. Any other location is suspicious.
- Digital Signature:: Right-click the process in Task Manager → Open file location → Right-click canon-sync.exe → Properties → Digital Signatures. Should show "Canon Inc.".
- Resource Usage:: Normal usage is 2-15% CPU and 60-150 MB memory for the process. Abnormal sustained usage outside typical operation is suspicious.
- Behavior:: Canon Sync should start when Windows loads only if configured. Unexpected background activity outside user settings may indicate tampering.
Red Flags: If canon-sync.exe is located in Temp, AppData, or System folders, lacks a valid digital signature, or runs constantly without a configured sync plan, scan with antivirus and verify with Canon support.
Why Is canon-sync.exe Running on My PC?
canon-sync.exe runs to keep your selected Canon Cloud Sync folders up to date. It may run all the time if you’ve enabled automatic syncing or scheduled background tasks.
Reasons it's running:
- Active Sync Tasks: You have folders configured for continuous synchronization; changes trigger uploads/downloads immediately.
- Background Cloud Sync: Canon Cloud Sync operates in the background to keep files current across devices even when the app window is closed.
- Startup Program: The utility is configured to start with Windows, so it may begin running as soon as the system boots.
- Continuous Monitoring: The watcher service monitors designated folders for file changes and enqueues sync tasks.
- Conflict Handling: Occasional lock or version conflicts may spawn additional workers to reconcile differences between local and cloud copies.
Can I Disable or Remove canon-sync.exe?
Yes, you can disable canon-sync.exe. You can pause syncing or uninstall the utility if you no longer need Canon Cloud Sync.
How to Stop canon-sync.exe
- Pause Sync in the App: Open Canon Cloud Sync and click Pause or Stop Sync to halt ongoing transfers.
- Disable Startup: Task Manager → Startup tab → Disable Canon Cloud Sync
- Stop Background Service: Open Services.msc, locate "Canon Cloud Sync Service" and click Stop
- Quit the Application: Exit the Unity/Tray icon and ensure no background processes remain
- Prevent Future Startup: Remove the startup entry from Task Scheduler or startup folder
How to Uninstall Canon Cloud Sync
- ✔ Windows Settings → Apps → Apps & features → Canon Cloud Sync → Uninstall
- ✔ Control Panel → Programs → Uninstall a program → Canon Cloud Sync → Uninstall
- ✔ Restart computer after uninstall to ensure all services stop
Common Problems: High CPU or Memory Usage
If canon-sync.exe is consuming excessive resources:
Common Causes & Solutions
- Large number of folders being synced: Limit to essential folders and exclude large, infrequently changed ones
- Frequent file changes or new files in synced folders: Pause syncing temporarily or adjust update frequency in settings
- Stuck in conflict resolution: Open the conflict resolver UI and resolve or skip conflicts
- Outdated Canon Cloud Sync client: Update to the latest version from Canon support
- Antivirus scanning synced files: Add CanonCloudSync folders to antivirus exclusions
- Corrupted local cache: Clear local cache or reinstall Canon Cloud Sync
Quick Fixes:
1. Quick Fixes:
2. 1. Open Canon Cloud Sync Task Manager and identify heavy tasks
3. Pause or resume as needed to measure impact
4. Exclude nonessential folders from syncing
5. Update to the latest Canon Cloud Sync version
6. Clear cache or reinstall if performance remains abnormal
Frequently Asked Questions
Is canon-sync.exe safe?
Yes. The legitimate canon-sync.exe from Canon is safe when located in C:\Program Files\Canon\CanonCloudSync or C:\Program Files (x86)\Canon\CanonCloudSync and signed by Canon Inc.
Why is canon-sync.exe running even when I don’t use Canon devices?
If you have Canon Cloud Sync configured to monitor shared folders or cloud-linked drives, the process may run in the background to keep those files up to date.
Can I delete canon-sync.exe without affecting my files?
Deleting the executable will stop syncing. You can uninstall the application through Windows Settings, but local files already synced remain in their folders.
Can I disable canon-sync.exe at startup?
Yes. Disable startup in Task Manager → Startup, or disable the service in Services.msc to prevent automatic launches.
Why does canon-sync.exe use network data?
The software uploads changes to Canon Cloud and downloads updates. If you’re on a metered connection, adjust sync frequency or pause syncing.
How do I verify canon-sync.exe is legitimate?
Check the file path, ensure a valid Canon digital signature, review active network activity, and confirm with Canon support if unsure.