Unable to install 3.5.7 update

I have a Lenovo laptop with Windows 10 64 bit OS. Today I attempted to install the 3.5.7 update but I get a message that this download "blocked because it might cause harm to your computer. I’m using the 3.5.3 engine and have never had an issue with VASSAL; all my current modules work fine, but today I tried to install VASL 6.6.2 which requires at least the 3.5.6 update. (I previously had an earlier VASL module but it seems to have disappeared.

Any help with this problem?

See here:

vassalengine.org/wiki/Troubl … _installer