reinstall error: "installation failed"

Hello @sara17

From experience this issue might be due to incomplete removal of BEST during the uninstallation process. Please make sure that you followed all steps from this article to ensure it was correctly removed:

https://www.bitdefender.com/business/support/en/77209-80124-using-the-uninstall-tool-to-remove-bitdefender-endpoint-security-tools.html#UUID-2a7d3494-b94d-6913-b083-150ad5afb238

If you have already done this and the error still persist, please reach out to our Enterprise Support team to further investigate:

https://www.bitdefender.com/en-us/support/contact-us?last_page=BusinessCategory

Regards,

Andrei