Zune install error XML Lite couldn't be found

When I tried to install Zune on my XP, I keep getting the error: Installation Media Not found, The meida for installation package 'XML Lite' couldn't be found, it might be incomplete ot corrupt Error code: 0x80070002 To solve the problem, download 'XML Lite' from Microsoft site  After I installed the XMLLite, the error goes away.