Hello (i'm not native English speaker, sorry if I dont express myself correctly)
I saw that my C: disk of 980 gb was full, something that is impossible because I have a lot of caution using my disk space, I have a gaming computer so I use an external SSD for my games.
Since I noticed that something was wrong I started a complete analysis of my system while I used "Treesize" so I could watch exactly where the problem was and I just noticed that Avast files on program data is weighing 543 Gb
What should I do? A virus just infected the main carpet of this antivirus?