"Error 7 (Windows error 126)" for Windows XP Home edition

Hi,

I have problems with installing iTunes correctly on my laptop.

I get the following error-message when I try to open iTunes:

"iTunes was not installed correctly. Please reinstall iTunes.
Error 7 (Windows error 126)"

Futhermore I get this error-message:

"This program can't start, because AVFoundationCF.dll couldn't be found."

I tried to install iTunes many times but nothing seems to work.
Help, pleace?