Your gui wallet download on github is infected with the virus coinminer.cc. Actually your not the only 1. The last to wallets i have been interested in has the same file. Devs want us to keep a wallet up and running to help secure the network but it is getting frustrating that we have to worry about what the wallet is actually doing.
Actually Windows detect a Virus because the wallet allow you to CPU mining, not a virus. Windows just detected that this app is able to mine... But won't mine unless you want to.