You can safely ignore these messages and go ahead and install the wallet just the same.
Clients ask me to install a wallet and buy DASH. Unfortunately, clients get scared when they see a virus. Everything is good in Bitcoin and customers are asking to buy BTC. THINK. This is a problem, solve it !!!
Alexey45, I think you better check your sources, only download from the correct location to avoid malware. https://imgur.com/a/w0zFXFt