There were / are some antiviruses that mark Tox clients as false positive.
Please make sure that you did get Tox from official Tox website.
If your antivirus is not on a list, you may want to report it. Please also report problem to your antivirus makers.
Gen:Variant.Adware.SMShoax.9” )Troj.Msil.Gen!c” ) Gen:Variant.Adware.SMShoax.9” )Trojan.Adware.SMShoax.9” )TR/Crypt.XPACK.Gen2” )Gen:Variant.Adware.SMShoax.9” )Gen:Variant.Adware.SMShoax.9 (B)” )Gen:Variant.Adware.SMShoax” )Virus: Gen:Variant.Kazy.205528” )Gen:Variant.Adware.SMShoax.9” )Trojan.MSIL.CoinStealer”)Trojan.MSIL.axpe”)Trojan.MSIL.CoinStealer.ej” )Gen:Variant.Adware.SMShoax.9” )NS:Adware.GigaClicks!1.A4C7 [F]” )PAK_Generic.005” )PAK_Generic.005” )Trojan.CoinStealer.Win32.64”)