The .7z file extension indicates a compressed archive, and "port" typically stands for a . The official Kerish PC Doctor site includes a portable mode during installation, which offers several advantages:

Portable versions are ideal for users who want to perform a one-time cleanup or maintain their system without having a background process running constantly. User Sentiment and Safety

Users have reported significant improvements in download/upload speeds after using its built-in internet connection tweaks.

Unlike basic cleaners, it performs "smart" defragmentation during PC downtime (avoiding SSDs to preserve their lifespan).