Windows 8.1 Virus Problem

Hi sro experts,
I have a problem and I need some help to resolve it.
I didn't plat SRO for about 2 years,now after I upgraded to Win 8.1 everytime I download a SRO Client I get a notification from Windows Defender that it's a malware.

I tryed about 4 different sro p-servers,all were infected.

I asked some people and they sayd the client is clean.

Do you know anything about this ? What could I do to play ?

I think i have seen an error similar to this error in win 2012 r2, you have to click more info then click Run anyway when it shows you this error, or if you are using any anti-virus you can simply exclude it from scanning.