Trial version_installation link

I just signed up for the trial version and after downloading the installation file I keep getting this message. Is there any solution for it?

Hi - I just downloaded that same file and it opened without problems here.
Have you tried to download it once more?

Hi! Thanks for the quick reaction. I tried several times and I get the same warning every time

Hi - do you have any anti-virus software installed?
Also, @iohanna, you could perhaps check the following page and see if those instructions help.

Hi Wim! It eventually worked. Thanks for helping!