Error code : -2147467259 (Unspecified error)

When I try to start the client, this error code ( Error code : -2147467259 (Unspecified error)) pop up everytime. Can someone tell me how to fix it ): ?

Try redownloading everything come tell me the results :3.

LOL ! Okays, I'll try that. Thanks for the reply :}

Edit: It doesn't work TT ~

This error is most the wrong WZ files.You sure you got the 8.0 right installed?

Yap, I got it correct.
P.S, I updated my device so its already solved (:

Edit: What to do now ~ ? Error code appear again T.T