Installing problems Titan QUEST PLEASE HELP

[RemisLT]

An error occurred while unpacking:does not match checksum!
Unarc.dll returned an error coide: -12
Error:file C:\Program Files\Titan Quest Universary Edition\Resources\XPack\Dialog_DE.arc failed CRC check

[Kotli]

You download got corrupted so redownload it or run the file check program. If that dont work take it with who you brought from which is not steam.