HT1349 itunes will not open on my computer, and says I need to reinstall it.  When I try to reinstall itunes I get an error message error #2502 and error #2503

When I try to open itunes I get a message that says that itunes is corupt and I needto reinstall it.  When I try to reinstall itunes Iget two error messages; error #2502 and error #2503.  How can I get itunes to work?

Many thanks.
Taken at face value, you're having trouble with an Apple Application Support program file there. (Apple Application Support is where single copies of program files used by multiple different Apple programs are kept.)
Let's try something relatively simple first. Restart the PC. Head into your Add or Remove Programs control panel, select "Apple Application Support", click "Change" and then click "Repair".
If no joy after that, try the more rigorous uninstall/reinstall procedure from the following post. (Although the procedure is for Vista and 7 and you've got XP, just read "Computer" as "My Computer", read "Uninstall a program control panel" as "Add or Remove programs control panel" and assume the system is 32-bit, and you'll be doing the right things.)
Re: I recently updated to vista service pack 2 and I updated to itunes 10.2.1 and ever

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