I started using windirstat to find where all my disk space was going, and came across a few files under C:\$Recycle.Bin that are taking up 32.8 GB. They all start with names like "S-1-5-18" and are dated between the time I bought my computer (2013) and 2 months after that. WinDirStat labels them as video files. They have odd names (a random collection of characters) but the folders contain a mix of file types I know i have used before. Are they safe to delete?