- The file type that you are trying to open is considered unsafe.
- The Launching applications and unsafe files security setting is set to Disable for the zone that is associated with where the file originated.
Method 1: Reset Internet Explorer security zone settings to their default levelTo reset Internet Explorer security zone settings to their default level, follow these steps:
- Start Internet Explorer.
- Click Tools, and then click Internet options.
- Click the Security tab.
- Click Reset all zones to default level, and then click OK.
Method 2: Reset Internet Explorer settingsTo learn how to reset Internet Explorer settings, click the following article number to view the article in the Microsoft Knowledge Base:
Note The steps in this article may not fully resolve the issue. For example, if the current Internet Explorer settings are being enforced by a Group Policy object (GPO), these steps may not resolve the issue. If you want further assistance in resolving the problem that is described in this article, contact Microsoft Customer Support.
More InformationWhen files are downloaded to a local computer that is running Windows XP Service Pack 2 or a later version, a security zone identifier is stored together with the file properties. This identifier corresponds to the Internet Explorer security zone for where the file was obtained.
When a downloaded file is identified as an unsafe file type, the Launching applications and unsafe files option for the corresponding security zone is queried for one of three options: Enable, Prompt, or Disable. The dialog that is mentioned in the "Symptoms" section will be displayed when the Launching applications and unsafe files option is set to Disabled.
For more information about unsafe file types, click the following article numbers to view the articles in the Microsoft Knowledge Base:
Artikelnummer: 2588679 – Letzte Überarbeitung: 15.08.2011 – Revision: 1