Itunes error is making me crazy!!!!!!!!!!!!!!!?

I have an issue, when I try to update my itunes on my computer it says: An error occured while trying to create the directory C:/programfile/quicktime/QTSystem/QuickTime3GPP.Resources can someone tell me how to get past this please?

?2010-04-26T18:46:19Z

Favorite Answer

restart your computer:)
pleaseee answer mineee!