The Sims 3 installation won't work.

[natatos]

I downloaded it from direct2drive.com and it opens up but then it says "could not verify the integrity of the installer" and then I click OK and it quits. How can I fix this?

 

[xparaparafreakx]

I know your gonna hate this but ... redownload that huge file again. It gonna suck I know but its the first thing they are going to tell you.

 

[sparklieflowers]

i redownloaded it and im still having problems. please help me!