That's weird, but my antivirus doesn't let me download Radium wallet. It says it is a virus. Is link https[Suspicious link removed] valid?
Allot of wallets do that for me. For instance google chrome tells me every wallet i try to download "could harm your computer" same with miners actually.
Yes, this happens because there was a time when many viruses hijacked computers and used their CPU's to mine for crypto's. Because of that, many anti-viruses flag any software that contains mining code.
J