Apologies for that first link...I must have been interested in watch WNBA on TV more than I was in noting that the reference was different...it happens, my apologies.
But my comments about torrents were not based on that link...most of the references to this program indicate that users acquire same via torrent download.
Disregarding that first link...my comments still stand.
I also use the Avira Free AV program...I have great confidence in its ability to function and I've not known it to set off on false positives. If you think it's not functioning properly...there are other programs to try/utilize, as well as online scanners.
As for your hesitancy to "shut down" your system...that's why backups have been recommended since using computers became popular.