A Command Prompt (CMD) window will open. You will likely see "Extracting..." or "Compressing..." messages.
GTA IV is notoriously poorly optimized for PC. To make your RIP version playable: gta iv rip7z install
Most RIPs are pre-patched to version 1.0.7.0 or 1.0.8.0 . If yours is version 1.0.0.0, search for the "GTA IV 1.0.7.0 Update" to fix major performance bugs. A Command Prompt (CMD) window will open