We guarantee that there is no threat in the installation. In the past, the HTA files were really easy to be exploited, that's why the antivirus companies recognize them as dangerous. Unfortunately the short time frame that we've had, didn't allow us to use WPF application for the welcome page, so we went with the HTA. This is still on the table though - starting with the next release, we will drop the HTA approach and will use WPF desktop application instead.
We apologize for the inconvenience.
Georgi Chokov | Technical Support Director
The Telerik Team
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