If you already have a non-legitimate copy (e.g., downloaded from a torrent with a Skidrow crack), the safest and most legal fix is to (it’s often on sale for $3–5). Cracks can contain malware, trigger antivirus false positives, and still crash due to missing updates or Windows 10/11 incompatibilities.
Players who use the Skidrow crack version of Assassin's Creed Revelations often encounter several issues, including: