If you are trying to download this file from a site other than www.trs-80.com, it will not work.
If you were on a site other than www.trs-80.com, please email the webmaster to let him know which web site you were on when you got this error.
If you were on www.trs-80.com and you get this message it is because your Internet Security/Privacy Settings (under your control panel) are set too high. If you lower the security settings, the problem will absolutely go away, and you will be able to download. If you are running a firewall, you will need to grant full access to www.trs-80.com
This is not a server side issue, so please do not email the webmaster about it.