When your sister's PC drive is filling up automatically and there are only specific folders like WindowsImageBackup and USER-PC visible, it's essential to investigate the root cause. Here are a few possibilities for the sudden consumption of space on the F drive: 1. WindowsImageBackup: This folder typically contains backups of the system made using the Windows Backup feature. These backups can significantly consume disk space, especially if they are scheduled frequently or set to save large amounts of data. 2. USER-PC: This folder might contain user-specific data or backups. It's important to check the contents to understand what is taking up space. 3. Virus/Malware: While it's not common for viruses to directly fill...