Security Update for Microsoft XML Core Services 4.0 Service Pack 2 (KB954430)
Update for Microsoft XML Core Services 4.0 Service Pack 2 (KB973688)
Both these updates are failing returning Error 64C.
I tried installing separately, no success. Its been quite a while having
issues with updates on my machine. I just upgrade to Windows 7 Ultimate from
Vista Home Premium hoping this would be corrected

no !!
I tried running windows update troubleshooter, no success. There must be a
patch that resets updates history/cache or something ???
Help please annoying to having updates showing forever..