Usually when you open the My Computer folder it shows the hard disk space, which is quite nice to have but I started to have problems with that indicator a few months ago and it changes without me deleting or adding stuffs into it. For example, Monday it shows: 150 GB free of 285GB. Tuesday it shows: 100GB free of 285GB. Tuesday night, it shows 128GB free of 285GB. I am quite concerned about this because I think I have a virus infection or an error with the indicator.