Why is there usually a folder called 1033 in Microsoft Folders
Solution 1:
IIRC 1033 is some internal code for American English - so you will see directories with different numeric names in internationalised versions of the software.
Edit: I do RC - http://msdn.microsoft.com/en-us/library/0h88fahh lists 1033 as the "Locale ID" for US English.
Solution 2:
This is the folder that contains localization resources. 1033 is English, as windows is available in different languages. If you're intersted here is a page showing the language codes