MD5 Summer or RapidCRC to compare your download against a known checksum list. If the wow.exe hash doesn’t match a clean Blizzard reference, delete it immediately.Version mismatch between client and server. Solution: Double-check your realmlist.wtf file. For 7.3.5 private servers, the file should be in Data/enUS/realmlist.wtf (or Data/realmlist.wtf ). The content should simply be: set realmlist logon.yourserver.com