Google chrome question again, cant install?

Okay, I had asked this question before, but since the question is old, I`m sure no one will find it and post on it again. I had chrome installed then one day I logged in and noticed that my google chrome icon was blank. So i looked for a file that had anything to do with google and it was all gone from my pc. Its not in the list of programs to remove, and its not in the Windows Program folder.

So I go to reinstall it, and right when installation is about to finish, it closes and says there was an unknown error and installation was not successful. Then it says to close chrome and try again.

Any ideas?

I have firefox now, but I am using the preloader since it bugs me on how long it takes to start up.