If the option appears, click the Keep dangerous file option on your browser’s download warning. If that option doesn’t appear in the pop-up warning, go to Chrome’s downloads page by selecting Downloads from the Windows menu or entering chrome://downloads into a new tab — or if you use Firefox, go the Tools menu and select Downloads. Once on your browser’s dedicated Downloads tab, select the Keep anyway or equivalent option that should appear. Download, scan if you wish, and open the files as normal.