bsync.exe

What is bsync.exe?

bsync-exe is the main background process for the BSYNC Synchronization Client. It monitors your selected folders for changes, constructs delta transfers, and coordinates updates between the local device and the cloud. The executable also handles conflict resolution, bandwidth throttling, and retry logic to keep files in sync across devices.

bsync-exe runs as a background service that watches for file changes, computes diffs, and sends encrypted blocks to the cloud. It negotiates bandwidth, retries failed transfers, and applies server-side rules to merge edits from multiple devices.

Is bsync-exe Safe?

bsync-exe is the legitimate background engine of the BSYNC Synchronization Client and is designed to run continuously to keep your files consistent across devices. When installed from the official BSYNC package, it uses TLS for data in transit, respects user-configured sync directories, and throttles activity to avoid overwhelming the system. If you obtained BSYNC from trusted sources and maintain updated security software, bsync-exe is a safe component of the product.

Is bsync-exe a Virus?

No, bsync-exe is not a virus when it comes from official BSYNC installations. Malicious variants can mimic bsync.exe by placing themselves in non-standard directories or by presenting invalid signatures. If bsync.exe is found outside its expected folder, lacks a valid digital signature, or exhibits unexpected network activity, perform a full system scan and verify its provenance.

How to Verify Legitimacy

1. Check File Location: Confirm bsync.exe is located at C:\Program Files\BSync\bsync.exe and not in a random folder.
2. Verify Digital Signature: Use C:\Program Files\Windows Kits\10\bin\x64\signtool.exe to verify the signature of C:\Program Files\BSync\bsync.exe.
3. Check File Hash: Compute SHA256 with C:\Windows\System32\certutil.exe -hashfile C:\Program Files\BSync\bsync.exe SHA256 and compare to the official value.
4. Scan for Malware: Run a malware scan on C:\Program Files\BSync\bsync.exe using C:\Program Files\Windows Defender\MsMpEng.exe or your preferred security scanner.

Why is it Running?

Reasons it's running:

• First-time or after installation: During initial setup, bsync-exe scans your folders to create the initial index and establish syncing rules, which can temporarily raise CPU and disk activity.
• Active syncing across devices: When edits occur on any connected device, bsync-exe coordinates transfers to ensure all copies reflect changes, causing noticeable network and I/O activity.
• Conflict resolution: If multiple devices modify the same file near the same time, bsync-exe resolves conflicts according to your preferences, which may trigger additional processing.
• Bandwidth throttling: BSYNC dynamically adjusts transfer rates to avoid saturating the network, causing fluctuations in observed activity depending on available bandwidth.
• Background optimization: BSYNC runs with a low priority in idle moments and on battery to reduce impact on foreground tasks, which can manifest as periodic activity spikes when resuming from idle.

Can I Disable or Remove It?

Common Problems

Common Causes & Solutions

• : Allow the initial index to complete; ensure large folders are not blocked by antivirus scans; adjust BSYNC throttling in settings to reduce immediate load.
• : Check internet connection, confirm the configured sync folders are accessible, and verify BSYNC is running with proper permissions; reopen the app if needed.
• : Ensure there are actual local changes or conflicts; verify ignore rules and exclude patterns to avoid unnecessary transfers.
• : Restart BSYNC services or the machine; verify there are no stale tasks from an incomplete uninstall; ensure only one instance is configured to run.
• : Add bsync.exe to allowlist in your firewall/AV; verify there are no group policy restrictions blocking network usage.
• : Update BSYNC to the latest version, revalidate permissions, and check for known compatibility notes in the official BSYNC support pages.

Related Processes