Developed by the legendary malware researcher "sUBs" and distributed by BleepingComputer.com, ComboFix was not a standard antivirus scanner. It was a specialized, highly aggressive targeting:

ComboFix does not support Windows 11 It is an older, specialized tool designed for Windows XP, Vista, 7, and 8. Attempting to run it on unsupported operating systems like Windows 10 or 11 can cause severe system instability or render the machine unbootable.

Sarah was on the verge of tears, as she had important work to finish and couldn't afford to lose any more time. John, determined to help, remembered a powerful tool that his colleague had recently introduced him to - ComboFix.