Ensure your PC has enough RAM and CPU power. Decompressing these files is "heavy" work and can take anywhere from a few minutes to an hour.
Most zrtofzoo repacks include a "QuickSFV" or file verification tool. Run this after installation to make sure every file was extracted correctly without corruption. Conclusion
Only download zrtofzoo repacks from verified, reputable forums or community-vetted sites. Avoid "mirrors" on shady websites that might have injected malicious code into the original archive. How to Install a Zrtofzoo Repack