BestSync Q&A

How to Install BestSync?

  1. Download the installer from the download page.
  2. When the browser begins to download the installer file, ignore any security warnings.
    Rest assured, the BestSync installer does not contain any viruses, spyware, or adware.
  3. When the download window appears, make sure to click the "Open" or "Open this program from its current location" option.
    If you select save, please remember where you save the program. After the download completes, start the installer by double-clicking the installer file.
  4. Follow the installation instructions. By default, the application will be installed to the "Program Files\RiseFly\BestSync" folder on the system drive.

How to Install an Older Version of BestSync?

Download older versions of BestSync here.

If you're usingWindows VISTA/7/8, please use the Administrator account to install BestSync.

If the installer of the old version is an MSI installer, when you install BestSync, if the installer fails with the error "The installer was interrupted before BestSync could be installed. You need to restart the installer to try again" ,please try to perform "an administrative install":
  Open a command prompt window as an administrator, and type:
     msiexec /a x:\BestSyncSetup.msi
  Where x:\BestSyncSetup.msi is the path to the MSI install file. Follow the on-screen instructions to install.

Alternatively, you can try to download the following .reg file. This .reg file will show the "Run as administrator" context menu when you right-click on the .msi setup package:

  Registry for running MSI setup package with Administrator privilege.

How to Install BestSync 32-Bit Version on 64-Bit Windows?

If you need to synchronize with Outlook 32-bit version on Windows 64-bit, you need to install BestSync 32-bit on 64-bit Windows.

After you download the installer SetupBestSync.exe, follow these steps:

1. Start the command prompt by using the "Run as administrator" context menu:

2. Change the directory to where the installer is located:

3. Run the following command line:

  SetupBestSync.exe /BIT=32

Do I Need to Uninstall an Old Version Before Installing the New One?

For Version 2.X, you must uninstall the old version before installing the new version. There will be two radio buttons labeled "Repair" and "Uninstall". Select "Uninstall" to uninstall the old version first. After uninstalling the old version, start the setup file again.

For BestSync 2008 and later versions, there's no need to uninstall the old version, just install the new version directly.

How to Uninstall BestSync?

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