Alexey45,  nothing will be fixed, because there is nothing to fix, there is no virus in the files downloaded from https://dash.org/downloads/ the reason some virus scanners report torjan or malware in the packages is because they consider mining software to be a trojan, eg in the case of Monero where a website steals cycles from your machine to mine that garbage.  You can safely ignore these messages and go ahead and install the wallet just the same.