1. Right-click the vault shortcut, and select Properties in the shortcut menu.

2. Go to the Security tab and click System in the Groups or user names section.
3. Check the permissions for System. If Deny is selected for read, write and modify, click Edit.

4. Clear the checkboxes in the Deny column. 
5. Click Apply. 

1. Copy the data vault to another folder, e.g. Documents.
2. In the main window of Kaspersky Total Security 2018, click More tools.

1. If you have problems opening the application window, see this guide.

3. Click Data Encryption.

4. Click I already have a data vault.

5. Select the path to the vault and click Select.

6. Click the Unlock button for that vault.

7. Enter the password and click Open data vault in Windows explorer.

If the issue persists, submit a request with a detailed description of the issue to Kaspersky Lab Technical Support via the My Kaspersky portal. For information on how to use My Kaspersky, please refer to the  Online Help page.