i am having problems downloading and installing the and i get a Error

[awkwardfrosty]

Installer integrity check has failed. common cause include incomplete download and damaged media contact the installer's author to obtain a new copy. more information at: http:/nsis.net/NSIS_Error

i am using windows 8.1 and i have downloaded the game over and again and it don't change

[awkwardfrosty]

why can't i get any help with this

[darkendrain]

I too have this problem and require assistance