upgrade required but won't install the vbs script

When trying to click the link in an email ( a very important one) it said I needed an upgrade. The upgrade file was flagged as a trojan virus but through many tasks, I got it as allowed but the vbs script will not install.  I get to the prompt to allow changes, but then nothing!  I already have Zoom on my pc but it doesn't want to find that one for some reason.  HELP!