Update and repair Windows Installer to fix the issue


  1. An attempt to install or update Acronis True Image fails with the following error message:
    Installation has failed
    The older version of this product cannot be removed because it seems to be corrupted
  2. See Solution 1.



The following Acronis products support macOS:

  • Acronis True Image 2016 and later
  • Acronis True Image for Mac (2015 version)
  • Acronis Backup 12.5
  • Acronis Backup Cloud
  • Acronis Mobility

(!) Other Acronis products do not support Apple Mac OS X. This means that:

Independent disks cannot be backed up with the virtual appliance when the virtual machine is turned on

The operation fails because the archive meta information is damaged or missing. Run vault validation to fix the issue

Start the Acronis Scheduler2 Service to fix the issue

You need to have Order ID and a serial number to retrieve the registration E-mail


  1. You set up e-mail notifications to Yahoo or to Outlook/Live/Hotmail in Windows version of Acronis True Image.
  2. Sending e-mail notifications fails with error message "An unknown error has occurred" or "Authentication failed".


Method 1. Fix email notification settings

問題を解決するために、VMware Tools を再インストールまたはアップデートします。


  1. ESX ホストで仮想コンピュータをバックアップするために上のいずれかの製品を使用しています。
  2. 次のいずれかのようなエラーメッセージが表示され、1 つまたは複数の仮想コンピュータのバックアップが失敗します。    

    処理待ちのタスクが失敗しました(スナップショット作成処理が、停止した仮想コンピュータの I/O 解放の制限時間を超えたため、静止スナップショットを作成できません。)


    異常停止した仮想コンピュータでスナップショット作成操作が I/O を保持できる制限時間を超過したため、静止スナップショットを作成できませんでした。


    VMware は選択した仮想コンピュータの静止スナップショットを作成できませんでした。コンピュータのバックアップを行うには、いったんコンピュータの電源をオフにするか、VM から VMware Tools のボリュームシャドウコピーサービス(VSS)サポート機能をアンインストールしてください。


An attempt to install or update Acronis True Image fails with the following error message:

Installation has failed. Another installation is already in progress. Complete that installation before proceeding with this install.


There is already a different installation in progress - this could be any product, not necessarily Acronis.

Windows does not support multiple simultaneous installations.

You attempt to perform a disk or partition backup that fails with the following error: "Failed to read the snapshot."

Make sure that Acronis Managed Machine Service runs under account that belongs to Administrators group

The product cannot access the hard disk drive to create a snapshot

This article provides information on how to find, identify and resolve typical errors in MSI logs of Acronis software


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