How do I add Sync to the Exclusions List on BitDefender Antivirus?
Some firewall and antivirus programs such as BitDefender may block Sync from working properly.
Here’s how to add Sync as an exception:
From the Protection Features window, click on the gear icon under Antivirus:
Go to the Exclusions tab and click on the Add button then click Browse:
On the Select a file or folder to exclude window, navigate to: C:\Users\yourusername\AppData\Local\Programs\Sync and select sync-taskbar.exe then click OK
Note: Replace yourusername with your actual Windows username
Select Both and click Add
Repeat #3 and #4, this time, selecting sync-worker.exe
Confirm that both .exe files appears in the list as below: