Hi Grant,
We have changed the installer technology in Mendix 8.1.0. Since then, the installer has not changed, so if you could install 8.1.1, you should be able to install 8.2.2 just fine.
I would recommend you to do the following:
Please note that we do not recommend you to disable your anti-virus.
If everything appears to be fine with your computer and the file, then please either contact your system administrator to see if they have stricter policies, or, if this is your personal computer or you have installed the AV software yourself, please contact the vendor of your anti-virus to check with them if they have any known false-positives.
Sorry for the inconvenience, but I hope this helps.
Best regards,
Alexander.
Disable your antivirus, run installer, enable anti virus?