If you are using the Kaspersky Antivirus software, it's important to know that PDF2XL is still not listed as a trusted program and the antivirus may prevent you from installing it.

We stand by the safety of our software and guarantee it's security, provided it has been downloaded from our own website and not from a third party.

Having said that, the only way to get around the Kaspersky block is to temporarily disable the Trusted Applications mode. You can learn more about that from the Kaspersky Support Page:
​https://support.kaspersky.com/11158
​
​